Answer: true
Explanation:
Given statement: smiles.substring(1, 5) returns "mile". This assertion absolutely is true.
How may a double be located in a string?In the try block, we transform the string to a Double using the parseDouble() method of Double to determine whether the text solely contains integers. The string isn't a number if it throws an error (such as a NumberFormatException fault), in which case numeric is set to false. It is a number if not.
How is a string defined?Similar to declaring a one-dimensional array, a string can be declared easily. size[char str name]; In the aforementioned syntax, size is used to specify the string's length, or the amount of characters it may hold. Str name is any name supplied to the string variable.
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round your answers to the nearest hundredths if needed -25+5s=8
Answer:
s = 6.6
-25 + 5 × 6.6 = 8
Just let me know if you need any more help.
The calculated load for a 3-phase, 240-volt load is 196 amperes. The installation consists of three single insulated conductors in electrical metallic tubing, Type EMT. What size RHW copper conductors are needed
The size of RHW copper conductors needed for this 3-phase, 240-volt load is 4/10 AWG.
What is copper conductors?Copper conductors are electrical wires composed of copper that are used to carry electrical currents. They are used in a variety of applications, including power generation and transmission, electronics, telecommunications, and consumer products. Copper is an ideal material for electrical conductors because it is highly conductive, durable, and cost-effective. Copper conductors are available in a range of sizes and shapes and are used in both residential and commercial settings.
This is based on the National Electrical Code (NEC) Table 310.15(B)(16), which states that the minimum size for a 196 ampere load is 4/10 AWG for three insulated conductors in an EMT conduit.
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increasing capacity just before a bottleneck operation will improve the output of the process.
a. true
b. false
Answer: true
Explanation: I haves
A resonant six-turn loop of closely spaced turns is operating at 50 MHz. The radius of the loop is λ/30. The radius of the wire is λ/300, its conductivity is σ = 5.7 × 107 S/m. Determine the:
a. the directivity of the antenna (in dB)
b. the radiation efficiency
c. the gain of the antenna (in dB)
a) the directivity of the antenna is evaluated to be = 1.761db
b) radiation efficiency is evaluated to be = 98.67%
c) reflection efficiency gain is evaluated to be = 68%
What is resonant?Resonance is the relatively large selective response of an object or a system to an external oscillatory force that causes it to vibrate in step or phase. First, acoustical systems like musical instruments and the human voice were studied for resonance.
The total range of resonance frequencies was discovered to be independent of mass, height, and mass-to-height ratio, ranging from 9 to 16 Hz.
Therefore, the correct options are: a) 1.761 db., b) 98.67%., c) 68%.
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A ? is a traditional tool used to align and mark vertical points from top to bottom.
Select one:
a. compass
b. plumb bob
c. protractor
d. ruler
Answer: B, plumb bob
Explanation:
A plumb bob's main job was to establish what is true (ie vertical and perpendicular to a surface,) as well as the secondary task of marking these points.
Compasses are mainly used to draw circles, protractors are used to measure angles, and rulers are used to measuring length.
Based on the case, which of the following are reasons why Boeing continues to expand internationally?
Multiple Choice
access to financial capital
availability of supplies and new markets
new markets
availability of supplies
Availability of supplies and new markets are reasons why Boeing continues to expand internationally.
What is Boeing?The Boeing Company is a global multinational American company that develops, produces, and markets aircraft, helicopters, rockets, satellites, telecommunications gear, and missiles. Additional services offered by the business include leasing and product support.
According to 2020 revenue, Boeing ranks third among the world's largest defence contractors. It is also the largest exporter from the United States in terms of dollar volume. Boeing is one of the biggest aerospace manufacturers in the world.
The Dow Jones Industrial Average counts Boeing stock as a component. Delaware serves as Boeing's corporate home. In Seattle, Washington, on July 15, 1916, William Boeing established Boeing. At the beginning of August 1997, Boeing and McDonnell Douglas merged to form the current corporation.
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Why is it critical for the upper and lower end sections of an engine to work perfectly together
Answer:
It is critical for the upper and lower end sections of an engine to work perfectly together because they are responsible for converting fuel into motion, which is necessary for the engine to operate effectively.
The upper end section of an engine includes the cylinder head and valves, which are responsible for controlling the flow of fuel and air into the engine. The lower end section of an engine includes the crankshaft, connecting rod, and pistons, which are responsible for converting the fuel's energy into rotational motion.
If the upper and lower end sections of an engine are not working perfectly together, it can lead to a variety of problems, including reduced engine performance, reduced fuel efficiency, and increased emissions. It is therefore critical for the upper and lower end sections to be carefully designed and calibrated to work together seamlessly in order to ensure the optimal performance of the engine.
Lighting track ____ permitted to be installed within a zone extending 3 feet horizontally and 8 feet vertically from the top of a bathtub rim.
Answer:
Lighting track is not permitted to be installed within a zone extending 3 feet horizontally and 8 feet vertically from the top of a bathtub rim.
Explanation:
disc type parking brake mechanically applies the brake pads againts the disc rotor when the actuating lever causes the check balls to ride up the ball ramp
Disc-type automotive braking systems mechanically apply the brake pads against the disc rotor when the actuator causes the control balls to move up the ball ramp.
Automotive disc braking systems are a safe and reliable form of braking. They are designed to stop the vehicle quickly and safely. These braking systems work by applying pressure from the brake discs to the brake discs mounted on the wheel axle.
This in turn causes the discs to press against the brake calipers, which in turn are applied to the discs. This action results in safe and reliable braking.
These braking systems also have a mechanical parking function, which is activated by the actuator lever. When the lever is activated, the control balls are moved up the ball ramp, which causes the brake discs to be applied to the rotor to ensure safe braking.
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Technician A says that after an accident you should take measures to avoid it in the future. Technician B says that it is okay to block an exit for a shop if you are actively working. Who is correct
Technician A is the correct answer. He is correct in saying that after an accident, you should take precautions to avoid it happening again in the future.
What to do after an accident?First, look for any injuries. If someone is in pain, take care of them.
After that, move your car to a safer location where you can exchange names, addresses, phone numbers, vehicle identification numbers, vehicle license plate numbers, insurance information, and driver's license information.
Finally, take note of the crash site and obtain the names, addresses, and phone numbers of any witnesses. If the vehicles cannot be moved, set up flares or raise your hood to protect the scene.
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the the rectangular components of acceleration for a particle are ax = 3t and ay= (30-10t) where a is in m/ s^2 . if the particles start from rest at the origin. find the radius of curvature of the path at the instant 2 second
Answer:
i like icecream
Explanation:
Need help with Part 1 – Additional Operations I MATLAB question
gove it to me. I'll do my best
The statements below refer to the design and operation of the power sub-system on a spacecraft. Select all those statements that are correct.
Partial credit is available for each correct answer. Select only those statements you know to be correct because negative marking is applied
within this question (although it is not possible to get a negative mark for the question overall).
Radioisotope Thermoelectric Generators (RTGS) are commonly applied to earth-orbiting spacecraft to provide power for the eclipse periodwhen the solar panels are ineffective.
Jupiter is considered the approximate limit for solar-powered orbital missions; missions to planets beyond this will require Radioisotope
Thermoelectric Generators (RTGS).
When sizing solar arrays, the area required typically has to be factored up as the temperature decreases because the cells operate less
efficiently when cold.
A spacecraft designed to operate in orbit at Mars will require generally require significantly smaller solar arays than one designed for
operation at Earth.
When sizing solar arrays, the area required must be factored up to allow for the array efficiency to decrease with time due to degradation.
When sizing solar arrays, the area required typically has to be factored up as the temperature increases because the cells operate less
efficiently when warm.
Radioisotope Thermoelectric Generators (RTGS) have many moving parts, which limits their reliability for long-duration missions.
For a spacecraft in planetary orbit, power for the eclipse period is commonly provided by a battery as a secondary power source, and an
increased solar array area to give extra power to charge the batteries whilst not in eclipse.
The statements below that refer to the design and operation of the power sub-system on a spacecraft is option
Radioisotope Thermoelectric Generators (RTGS) are commonly applied to earth-orbiting spacecraft to provide power for the eclipse period when the solar panels are ineffective.Jupiter is considered the approximate limit for solar-powered orbital missions; missions to planets beyond this will require Radioisotope Thermoelectric Generators (RTGS).A spacecraft designed to operate in orbit at Mars will require generally require significantly smaller solar arrays than one designed for operation at Earth. This is because Mars is farther from the sun than Earth, so it receives less sunlight. A smaller solar array is needed to generate the same amount of power as a larger array would at Earth because of the decreased amount of sunlight.When sizing solar arrays, the area required must be factored up to allow for the array efficiency to decrease with time due to degradation.7. For a spacecraft in planetary orbit, power for the eclipse period is commonly provided by a battery as a secondary power source, and an increased solar array area to give extra power to charge the batteries whilst not in eclipse.
Why is the above statement correct?Radioisotope Thermoelectric Generators (RTGS) are commonly applied to earth-orbiting spacecraft to provide power for the eclipse period when the solar panels are ineffective.
This is because RTGS use the heat generated by the decay of a radioactive material to generate electricity, which allows them to continue to produce power even when the solar panels are not receiving sunlight.
Therefore, Jupiter is considered the approximate limit for solar-powered orbital missions; missions to planets beyond this will require Radioisotope Thermoelectric Generators (RTGS). This is because as you move farther away from the sun, the amount of sunlight received by the solar panels decreases, making it difficult to generate enough power to operate the spacecraft. RTGS are a more reliable power source for missions to these outer planets because they do not rely on sunlight to generate power.
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Which of the following ion is the largest in size?a K+ b Ca2+ c Cl- d S2-
The ionic radius of Ca²⁺ is 100 pm, K⁺ is 138 pm, Cl⁻ is 181 pm, and S²⁻ is 184 pm, therefore option d is the right choice.
The influence of an ion's nucleus on its electron cloud extends outward to a distance called the ionic radius.
When an atom loses or gains an electron, an ion is created. A cation is formed when an atom loses an electron, and an anion is formed when an atom gains an electron. The ionic radius is the furthest point away from the ion's nucleus that its outermost shell can extend.
A cation's atomic size will be lower than that of its parent atom. Compared to its parent atom, an anion is comparatively large. That's because the net effective nuclear charge gets drowned out by the repulsion between electrons caused by an atom gaining electrons.
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What qualitative effect would you expect each of the following to have on the P50 of hemoglobin (5 pts) a) Increase in pH from 7.0 to 7.4 Answer ___
b) Increase in Pco2 from 25 mmHg to 35 mm Hg Answer___
c) Dissociation into monomer polypeptide chains Answer ____
d) Decrease in 2,3-BPG concentration from 8 mM to 4 mM in red cells Answer___
You would expect each of the following to have a lower p50 qualitative effect on hemoglobin (5 pts) a) Raising the pH from 7.0 to 7.4.
What does "qualitative influence" mean?On the forecasts, there is a "qualitative influence." Reliability and accuracy are two characteristics of forecasts. The dependability or accuracy of the forecasts may improve or worsen, depending on the qualitative effect.
What does a polypeptide protein's monomer look like?Acitric Acids As an illustration, amino acid monomers make up proteins. A functional protein is created by folding a chain of linked polypeptides into a three-dimensional (3D) structure.
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Gear B supplies 15 kW of power, while gears A, C and D withdraw 6 kW, 4 kW and 5 kW, respectively. If the shaft is made of steel with the allowable shear stress of tau_allow = 75 MPa, and the relative angle of twist between any two gears cannot exceed 0.05 rad. determine the required minimum diameter d of the shaft to the nearest millimeter. The shaft is rotating at 600 rpm.
Using the formula of shear stress, the minimum required diameter is 0.81mm
What is Shear StressShear stress is a force that causes two objects to slide past each other in opposite directions. It is the force per unit area of the surface on which the force is applied. Shear stress is often caused by two objects rubbing against each other, such as a car tire sliding on the road. It can also be caused by wind, gravity, or other forces.
The shear stress on the shaft can be calculated using the formula:
τ(allow) = P/(2*π*d*J)
where P is the total power transferred by the shaft, d is the diameter of the shaft, and J is the polar moment of inertia.
J = π*d⁴/32
Substituting the given values,
τ(allow) = (15 + 6 + 4 + 5)/(2*π*d*π*d⁴/32)
d = √[32*(15 + 6 + 4 + 5)/(τ(allow)*2*π²)]
d = √[32*(30)/(75*2*π²)]
d = 0.81mm
The minimum required diameter of the shaft is 0.81 mm to the nearest millimeter.
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A 2 HP, 120 V, single phase motor requires a _________________________ inverse time circuit breaker branch circuit short circuit and ground fault protective device. The motor has a nameplate FLC of 22.1 amperes.
A 2 HP, 120 V, single phase motor requires a 20 ampere inverse time circuit breaker branch circuit short circuit and ground fault protective device.
What is circuit?
A circuit is an electrical path between two or more points that allow electricity to flow. It consists of various components like resistors, capacitors, transistors, diodes, and wires. Each component serves as a building block to create a functioning circuit. Circuits are used to control and direct electricity to power a variety of devices like computers, televisions, radios, and more. They are at the heart of any electrical system, from the most simple to the most complex. By properly combining the components in a circuit, electricity can be directed to flow in the desired manner and perform the required tasks. Circuit design is an important engineering field and can be used to create many practical applications.
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Problem 9.10. Which of the following sets of values is closest to iL(0), vC(0).
Problem 9.10. Which of the following sets of values is closest to the energy stored in the capacitor and inductor (in J) at t=0-
Problem 9.10. What is the value of Vmax (integer answer required) in Volts
Problem 9.10. Which of the following is closest to the expression for vc(t) in Volts
In the cicuit of Figure P9.10, suppose ui"(1) = 10 V, R= 10 Ω, C = 0.4 mF, L = 0.25 (a) Compure 0), vo) i(0), and i1(0*)
(b) Compute the energy stored in the inductor and the capacitor at t = 0
(c) Using only energy considerations, compute the maximum value of ), t> 0 (d) Find the analytical expression for vt), and verify the maximum value of v) computed in part (c)
The energy of the magnetic and electric fields that have been stored can differ. A completely charged capacitor is linked in series with an inductor.
A passive-terminal electric device called an inductor, often referred to as a coil, choke, or reactor, stores electricity in a magnetic field when electric current passes through it. An insulated string twisted into a coil is typically included in an inductor. A passive digital component called an inductor can store electrical energy in the form of magnetic electricity. In essence, it uses a conductor that has been twisted into a coil; as electricity enters the coil from left to right, this will produce a magnetic field that rotates counter clockwise. The energy of the magnetic and electric fields that have been stored can differ.
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The power supply of a 3phase induction motor is 40kw and the corresponding stator losses are 1.5kw. Calculate the total mechanical power developed below
Two different kinds of losses can happen in a three-phase induction motor. These losses are variable losses that are constant or fixed losses. Fixed or Constant Losses Consta.
Exactly how are stator losses determined?Stator losses, including as stator iron loss and stator copper loss, are financed in part by this power input. Rotor input is provided with the leftover power, or (input electrical power - stator losses). Thus, rotor input P2 equals Pin minus stator losses (stator copper loss and stator iron loss).
What are the induction motor's three-phase losses?Fixed losses, Copper losses, and stray losses are a few types of losses that can occur in three-phase induction motors. Core losses, bearing friction losses, brush friction losses (in wound rotor motors), and windage losses make up the majority of these losses.
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In a single-family residence, a line-voltage thermostat is primarily used to control _____.
Answer:
In a single-family residence, a line-voltage thermostat is primarily used to control heating and cooling systems.
A 6-cm-diameter horizontal water jet having a velocity of 25 m/s strikes a vertical stationary
flat plate. The water splatters in all directions in the plane of the plate. ANALYZE the linear
momentum equation for a fixed control volume to find; the amount of force required to hold
the plate against the water stream? Take the density of water to be 1000 kg/m3
There is a point where the streamlines, located in the boundary layer of air right next to the wings surface, will separate from the airfoil. This point is called
The point where the streamlines, located in the boundary layer of air right next to the wings surface, will separate from the airfoil is called Stall.
What is a Stall?
A stall occurs when an aerofoil's angle of attack exceeds the value that produces maximum lift as a result of airflow across it. This angle is typically around 15° and varies very little in response to the cross section of the (clean) aerofoil.
The airflow across the upper cambered surface ceases to flow smoothly and in contact with the upper surface at the stall and becomes turbulent, greatly reducing lift and increasing drag. The deployment of leading edge or trailing edge devices changes the effective configuration of a wing, which directly affects the angle of attack at which an aerofoil stalls.
All of this, however, assumes a clean wing, and for any aerofoil, contamination of the normally smooth surface by frozen deposits results in a change in the angle of attack at which a stall occurs.
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Tech A says that one approved way to clean dust off brakes is with compressed air. Tech B says that some auto parts may contain asbestos. Who is correct
Tech B is correct it's a verified fact that some auto parts may contain asbestos.
Do auto parts contain asbestos?
Asbestos has been used in a wide range of automotive products, including brakes, clutches, hood liners, gaskets, heat shields, and many others.
Drum and disc brakes were traditionally made with 35% to 60% asbestos. It is still legal in the United States to sell asbestos-containing auto parts, and many brake and clutch parts contain up to 35% asbestos.
Contaminated parts have been found in vehicles of all types, including cars, trucks, motorcycles, buses, trains, and military vehicles. Elevators and other types of transportation machinery also used asbestos brakes.
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the branch circuit conductors for a 5 hp, 230V, single-phase motor with a nameplate rating of 25 A must have an ampacity of ___________ or greater.
The branch circuit conductors for a 5 hp, 230V, single-phase motor with a nameplate rating of 25 A must have an ampacity of 30 A or greater.
What is circuit?
A circuit is an interconnection of electronic components that allows electricity, signals or data to flow from one component to another. It can be as simple as a single resistor or as complex as a microprocessor. Circuits are used to provide power to devices, control signals, process data or any combination of these. Circuits can be made from components such as resistors, capacitors, transistors, integrated circuits and microprocessors.
According to the National Electrical Code (NEC), the minimum branch circuit conductor size for a 5 hp, 230V, single-phase motor with a nameplate rating of 25 A must be sized at 30 A or greater. This is because the NEC requires a branch circuit conductor to have an ampacity at least 125% of the full-load current rating of the motor.
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What is the 8-digit binary value of the last octet of the IPv4 address 172.17.10.7? O 00000111 O 01100110 O 00001111 O 00000110 Question 10 1 pts A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits? 255.255.255.128 255.255.255.0 O 255.255.255.224 O 255.255.255.240 Question 11 1 pts In which alternative to DHCPv6 does a router dynamically provide IPv6 configuration information to hosts? O SLAAC O ARP O ICMPv6 O EU1-64
The router will be informed of the appropriate host ID by the last octet, which is the octet of the sub-net mask 255.255.255.0.
In the IPv4 component of the address, one octet is referred to as x and is a decimal value between 0 and 255. Periods are used to separate the octets. Three periods and four octets are required in the IPv4 component of the address. People may have also heard the term "octets" used to describe the four numbers that make up an IP address. The right name for the four distinct digits that make up an IP address is an octet. The third octet of sub-netting is used to specify specific sub nets of network 150.150.0.0. In the example in the image, each sub-net number has a different value in the third byte, signifying that it is a separate sub-net number.
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Which of the following is a good technique for building safer structures in an earthquake zone? a. Place shock absorbers on the tops of buildings to add stability. b. Use wood-frame construction. c. Use unreinforced walls so the walls can sway. d. Use concrete-block construction.
The following is a good technique for building safer structures in an earthquake zone is to use concrete-block construction.
What is an earthquake zone?
An earthquake zone is an area that is prone to frequent seismic activity. These zones are commonly located near active fault lines, where the Earth's tectonic plates constantly move. Earthquakes can cause significant damage to the local area, so it is important to be aware of the potential dangers of living in a seismically active region. In order to assess the risk, geologists and seismologists will measure the frequency and intensity of past earthquakes to determine the potential hazard posed by a particular area. Earthquake zones can also be classified according to their potential for danger, with some areas having a higher risk than others. It is important to remember that earthquakes can occur anywhere and that safety precautions should always be taken when living in a seismically active region.
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For gas piping other than black or galvanized steel installed in a concealed location, a shield plate shall be provided for protection against physical damage where a bored hole is located a maximum of ________ from the edge of the wood member.
For gas piping other than black or galvanized steel installed in a concealed location, where a bored hole is located a maximum of 1/2 inch from the edge of the wood member.
What is galvanized steel?
Galvanized steel is a type of steel that has been treated with a layer of zinc oxide to protect it from corrosion. This layer is bonded to the steel so that it will not flake or peel off. Galvanized steel is often used in the construction industry because it is highly resistant to rust and other forms of corrosion. It is also used in the automotive and appliance industries as well as in the production of water pipes, fencing, and other metal items. Galvanized steel is cost-effective and easy to maintain, making it a popular choice for many applications. It is also environmentally friendly since it does not require the use of chemicals or paints. Galvanized steel is a durable and versatile material that is essential for many projects.
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Which of the following best describes the devices that will help prevent moisture from collecting in raceway systems?
a. Elbows
b. Integral drains
c. Strainers
d. Seal-off fittings
The best device to help prevent moisture from collecting in raceway systems is integral drains.
Integral drains are specifically designed to allow water to drain away from the system without the need for additional components. Elbows and strainers are not effective for this purpose, and seal-off fittings are primarily used for dust and debris protection.
Raceway systems are a type of electrical wiring system used to protect electrical wires and cables. They are typically used in industrial applications and are designed to be durable, reliable, and safe. Raceway systems typically consist of raceways, which are channels made of metal or plastic, and fittings, which provide a secure connection between the raceways and other components, such as switches and outlets.
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Consider the velocity field v={−4yti+2xtj}m/s for the following parts
The velocity field isn't conservative, though.
What exactly is Velocity ?
Velocity is the direction at which an item is moving and serves as a measure of the rate at which its location is changing as seen from a particular point of view and as measured by a specific unit of time (for example, 60 km/h northbound). In kinematics, the area of classical physics that deals with the motion of bodies, speed is a basic idea.
A physical scalar quantity called velocity must have both a magnitude and a direction in order to be characterized. Speed is the scalar absolute value (intensity) of velocity; it is a coherent basic determinant whose quantity is measured in metres per second (m/s or m/s1) in the SI (measurement units).
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Verify that the indicated function y=ϕ(x)y=ϕ(x)
is an explicit solution of the given first-order differential
equation. By considering ϕϕ simply as a function, give its domain. Then by considering ϕϕ as a
solution of the differential equation, give at least one interval II of definition.
y′=25+y2;y=5tan5xy ′ =25+y 2 ;y=5tan5x
After considering ϕϕ simply as a function, its domain is ⇒ [-4 , ∞).
What is differential equation?When one or more functions and their derivatives are included in a mathematical equation, it is referred to as a differential equation. A function's derivatives at a given point determine how quickly the function will change.
Physicists, engineers, and biologists use it most frequently. Differential equations are primarily used to analyse solutions that satisfy the equations as well as the characteristics of the solutions. The differential equation can be solved in a variety of ways, but one of the simplest is by using explicit formulas.
y = x + 6√(x + 4)
⇒ y' = 1 + 6[ 1/(2√(x + 4))] since d/dx xn = nxn-1 , d/dx √x = 1/(2√x)
⇒ y' = 1 + 3/√(x + 4)
(y -x)y' = (6√(x + 4))(1 + 3/√(x + 4)) = 6√(x + 4) + 18
y-x+18 = 6√(x + 4) + 18
ϕ(x) = x + 6√(x + 4)
Domain ⇒ x + 4 >= 0 ⇒ x >= -4
⇒ Domain ⇒ [-4 , ∞)
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