Ivory successfully shot 7 free throws in 15 free-throw attempts. How many additional successful free throws, without a miss, must she make in order to attain a success rate of $75\%$

20 students are selected at random from each grade level, of random sampling within each stratum.

A random sample from each grade level, the survey plan ensures that each grade level is represented in the sample, and that the sample is likely to be representative of the entire school population.

The survey plan described in the question is a combination of two different sampling techniques:

stratified sampling and random sampling.

Stratified sampling involves dividing the population into subgroups, or strata, based on certain characteristics that are relevant to the research question.

The population is divided by grade level, which is likely to be a relevant factor when it comes to determining student support for the student-council president.

The purpose of stratified sampling is to ensure that each subgroup is represented in the sample in proportion to its size in the population.

This helps to minimize sampling bias and increase the precision of the estimates obtained from the sample.

Once the population is divided into subgroups, random sampling is used to select a sample from each stratum.

Random sampling involves selecting individuals from the population in such a way that each individual has an equal chance of being selected.

This helps to ensure that the sample is representative of the population and that any estimates obtained from the sample are unbiased.

In this survey plan, 20 students are selected at random from each grade level, which is an example of random sampling within each stratum.

By selecting a random sample from each grade level, the survey plan ensures that each grade level is represented in the sample, and that the sample is likely to be representative of the entire school population.

Overall, the survey plan described in the question is a good example of how different sampling techniques can be combined to obtain a representative sample of a population.

By using stratified sampling to divide the population into subgroups and random sampling to select individuals from each subgroup, the survey plan helps to minimize sampling bias and increase the precision of the estimates obtained from the sample.

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The solution is, the duration of the 1st part is 1.125 mint.

here, we have,

given that,

A TV series has three parts. The duration of part 2 is 118 times the duration of part 1. Part 3 is 15 minutes longer than part 1. The total duration of the whole series is 150 minutes.

now, we have to find the duration of the 1st part

we get,

The total duration of the whole series is 150 minutes.

let, the duration of the 1st part= x

so, The duration of part 2 is =118x

The duration of part 3  = x + 15

so, we get,

x + x+15 + 118x = 150

or, 120x = 135

or. x = 1.125

Hence, the duration of the 1st part is 1.125 mint.

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We can use trigonometry to solve this problem. The angle of elevation from the boat to the top of the lighthouse is the

angle between the horizontal line from the boat to the lighthouse and the line from the boat to the top of the lighthouse. This angle is the inverse tangent of the ratio of the height of the lighthouse to the distance from the boat to the base of the lighthouse:

tan(theta) = opposite/adjacent = height/distance

In this case, the height of the lighthouse is 34 meters and the distance from the boat to the base of the lighthouse is 122 meters, so we have:

tan(theta) = 34/122 = 0.2787

To find the angle theta, we take the inverse tangent of both sides:

theta = tan^-1(0.2787) = 15.49 degrees

Therefore, the angle of elevation from the boat to the top of the lighthouse is approximately 15.49 degrees.

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The proportion of people with blood type B will be within 0.07 of the true proportion for the entire population.

To determine the sample size needed to estimate the proportion of people with blood type B within a certain margin of error and a certain level of confidence, we can use the formula:
n = (z^2 * p * q) / E^2
Where:
n = sample size
z = z-score for the desired level of confidence (in this case, 2.576 for 99% confidence)
p = estimated proportion of people with blood type B (since we have no preliminary estimate, we can use 0.5 as a conservative estimate)
q = 1 - p
E = maximum allowable margin of error (in this case, 0.07)
Plugging in the values, we get:
n = (2.576^2 * 0.5 * 0.5) / 0.07^2
n = 369.67
Rounding up to the nearest whole number, we get a sample size of 370. Therefore, if we randomly select and examine 370 medical files, we can be 99% confident that our point estimate of the proportion of people with blood type B will be within 0.07 of the true proportion for the entire population.

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Answer:

Let s be the speed of the plane. Then s - 100 is the speed of the car.

640/s = 240/(s - 100)

640(s - 100) = 240s

8(s - 100) = 3s

8s - 800 = 3s

5s = 800, so s = 160 mph

The speed of the plane is 160 mph, and the speed of the car is 60 mph.

There are 8 outcomes in the sample space.

When flipping a coin 3 times, there are 2 possible outcomes for each flip: heads (H) or tails (T). Thus, the total number of outcomes in the sample space is the number of possible combinations of H and T for 3 flips, which is 2³ = 8.

These outcomes can be listed as follows: HHH, HHT, HTH, THH, HTT, THT, TTH, and TTT. Each outcome is equally likely to occur, assuming the coin is fair and the flips are independent.

The concept of sample space is an important one in probability theory, as it represents the set of all possible outcomes of an experiment.

Knowing the sample space can help us calculate probabilities for specific events within that space and inform decision-making in a wide range of fields, from finance to sports to public health.

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The mean weight of certain sheets of wrapping paper is 10 g each.

The mean weight of the sheets of wrapping paper is given as 10 g each. This means that on average, each sheet weighs 10 grams. The standard deviation of the weight of the sheets is given as 0.05 g.

This indicates the degree of variability or spread in the weight of the sheets around the mean weight of 10 g. A standard deviation of 0.05 g suggests that most of the sheets will have a weight that is very close to 10 g, with only a few sheets having a weight that deviates significantly from the mean.

The mean weight of the sheets of wrapping paper can be used as a reference point for determining the weight of a particular sheet or for calculating the weight of a bundle of sheets.

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The area of the triangle is 19.5 square units.

To find the area of the triangle, we can use the formula:

Area = (1/2) * base * height

where the base and height are the distance between two of the vertices of the triangle. We can choose any two vertices to use as the base and height, as long as we use the same units for both. Let's choose (-3,2) and (6,-2) as our base.

The distance between (-3,2) and (6,-2) can be found using the distance formula:

d = [tex]\sqrt((6 - (-3))^2 + (-2 - 2)^2)[/tex]
d = [tex]\sqrt(81 + 16)[/tex]
d = [tex]\sqrt(97)[/tex]

Now we need to find the height of the triangle. The height is the perpendicular distance from the third vertex (3,5) to the line containing the base (-3,2) and (6,-2). We can use the formula:

height = [tex]|Ax + By + C| / \sqrt(A^2 + B^2)[/tex]

where A, B, and C are the coefficients of the line in the standard form Ax + By + C = 0, and x and y are the coordinates of the third vertex. We can find the coefficients of the line by using the two points (-3,2) and (6,-2):

A = 2 - (-2) = 4
B = (-3) - 6 = -9
C = 6*(-2) - (-3)*2 = -18

Now we can plug in the values to find the height:

height = [tex]|4*3 - 9*5 - 18| / \sqrt(4^2 + (-9)^2)[/tex]
height = [tex]39 / \sqrt(97)[/tex]

Finally, we can plug in the base and height to find the area:

Area = [tex](1/2) * \sqrt(97) * (39 / \sqrt(97))[/tex]
Area = 19.5

Therefore, the area of the triangle is 19.5 square units.

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Answer:

(x + 10)(2x + 5) - (x + 1)(x + 1)

= 2x^2 + 25x + 50 - (x^2 + 2x + 1)

= x^2 + 23x + 49

The probability that three of the students - Anthony, Brian, and Chantal - are in the same lab group today is 0.443.

We can start by calculating the total number of ways to divide 15 students into 5 groups of 3:

Total number of ways = (15 choose 3) × (12 choose 3) ×(9 choose 3) × (6 choose 3) × (3 choose 3) = 5,005,296

Next, we want to find the number of ways to arrange the 15 students such that Anthony, Brian, and Chantal are in the same group.

We can treat these three students as a single unit and arrange the remaining 12 students into 4 groups of 3. The number of ways to do this is:

Number of ways to arrange 12 students into 4 groups of 3 = (12 choose 3) × (9 choose 3) × (6 choose 3) × (3 choose 3) = 369,600

Finally, we can arrange Anthony, Brian, and Chantal within their group in 3! = 6 ways. Therefore, the total number of ways to arrange the 15 students such that Anthony, Brian, and Chantal are in the same group is:

Number of ways to arrange 15 students with A, B, and C in the same group = 369,600 × 6 = 2,217,600

The probability of this happening is therefore:

Probability = Number of ways to arrange 15 students with A, B, and C in the same group / Total number of ways

Probability = 2,217,600 / 5,005,296

Probability ≈ 0.443

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Answer: As the exponent decreases by 1, the value of the power is divided by 5.

Step-by-step explanation:

The shortest length of cable needed is approximately 3464 ft.

.To find the shortest length of cable needed for the cable car running to the top of the mountain. We'll use the terms: mountain height (3400 ft), inclined angle (74 degrees), and distance from the base (1000 ft).

Step 1: Draw a right triangle where the hypotenuse represents the cable, the vertical leg represents the mountain's height (3400 ft), and the horizontal leg represents the distance (1000 ft) from the base of the mountain.
Step 2: We are given the inclined angle (74 degrees) between the hypotenuse and the horizontal leg. We can use the sine function to find the ratio between the height (opposite leg) and the length of the cable (hypotenuse).

[tex]sin(74 degress) = \frac{height}{hypotenuse}[/tex]
Step 3: Plug in the height (3400 ft) and solve for the hypotenuse.

[tex]sin(74 degress) = \frac{3400}{hypotenuse}[/tex]
[tex]hypotenuse = \frac{3400}{sin(74 degrees)}[/tex]
Step 4: Calculate the value hypotenuse = 3464.45 ft
Step 5: Round the answer to the nearest foot.

The shortest length of cable needed is approximately 3464 ft.

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To find the length of one side of Steve's hamster pen, we can use the formula for the perimeter of a square, which is P = 4s, where P is the perimeter and s is the length of one side. In this case, we know that the perimeter is 240 centimeters, so we can set up the equation 240 = 4s. To solve for s, we can divide both sides by 4, which gives us s = 60 centimeters. Therefore, the length of one side of Steve's hamster pen is 60 centimeters. This means that all four sides of the pen are equal in length, and the area of the pen would be 60 x 60 = 3600 square centimeters.
Hi! To find the length of one side of Steve's square hamster pen with a perimeter of 240 centimeters, you can follow these steps:

1. Understand that the perimeter of a square is the sum of all its sides. In a square, all sides are equal.
2. Since there are 4 sides in a square, you can divide the total perimeter by 4 to find the length of one side.
3. Perform the calculation: 240 cm / 4 = 60 cm.

So, the length of one side of Steve's hamster pen is 60 centimeters.

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The polling agency must survey at least 3075 college students to estimate the proportion of students who voted in the last election within a 0.025 margin of error with a 95% confidence level.

In order to determine the sample size needed for a public opinion polling agency to estimate the proportion of college students who voted in the last election within a 0.025 margin of error, you can follow these steps:

1. Determine the desired level of confidence, usually expressed as a percentage (e.g., 95% confidence level).

2. Calculate the z-score corresponding to the desired level of confidence. For a 95% confidence level, the z-score is 1.96.

3. Use the formula for estimating sample size:
  n = (z^2 * p * (1-p)) / E^2

  Here, n is the sample size, z is the z-score, p is the estimated proportion of students who voted, E is the desired margin of error (0.025 in this case).

4. Since we don't know the actual proportion (p) of students who voted, we can use the conservative assumption of p = 0.5 (50%), as this will result in the largest required sample size.

5. Plug the values into the formula:
  n = (1.96^2 * 0.5 * (1-0.5)) / 0.025^2
  n = (3.8416 * 0.5 * 0.5) / 0.000625
  n = 1.9208 / 0.000625
  n ≈ 3074.08

6. Since the sample size must be a whole number, round up to the nearest whole number: n = 3075.

Therefore, the polling agency must survey at least 3075 college students to estimate the proportion of students who voted in the last election within a 0.025 margin of error with a 95% confidence level.

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The expression 2^4×2^5/4^3×4^4 when evaluated has a solution of 2^-5

In this question, the expression is given as

2^4×2^5/4^3×4^4

Evaluating the exponents

So, we have

2^4×2^5/4^3×4^4 = 2^9/4^7

Express 4 as 2^2

So, we have

2^4×2^5/4^3×4^4 = 2^9/2^14

Apply the law of indices

So, we have

2^4×2^5/4^3×4^4 = 2^-5

Hence, the solution to the expression is 2^-5

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The height and radius of the cup are 4.41 cm and 2.07 cm respectively

To minimize the amount of paper used, we need to minimize the surface area of the cup. Let h be the height and r be the radius of the cone. Then we have:
[tex]Volume of cone = \frac{1}{3}  πr^{2} h = 36 cm^{3}[/tex]

Solving for h, we get:
[tex]h = \frac{108}{(πr^2)}[/tex]

Now we can express the surface area of the cone as:
[tex]Surface area = πr^2+ πr\sqrt{r^{2}+h^{2}  }[/tex]

Substituting the expression for h, we get:

[tex]Surface area = πr^2+πr \sqrt{(r^{2} +(\frac{108}{(πr^2)^{2}) } )}[/tex]

To minimize this function, we take its derivative with respect to r and set it equal to zero:
[tex]\frac{d}{dx} (Surface area) =  \frac{2πr - 108r }{[(r^2+(\frac{108}{πr^2}))^{0.5}  }] - \frac{108π}{r^2 }  = 0[/tex]

Simplifying, we get:
[tex]2r^3 - \frac{108^2}{π} = 0[/tex]

Solving for r, we get:
[tex]r = (\frac{54}{π})^{\frac{1}{3} }[/tex]

Substituting this value into the expression for h, we get:
[tex]h = \frac{108}{\frac{54}{π} ^{(\frac{2}{3}π )} }[/tex]

Thus, the height and radius of the cup that will use the smallest amount of paper are:
height = 4.41 cm
radius = 2.07 cm (rounded to two decimal places)

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Answer:

We can write the inequality as:

p > 175 (since the cost of the coat must be greater than $175)

and

p ≤ 430 (since the shopper cannot spend more than $430)

Combining these two inequalities, we get:

175 < p ≤ 430

Therefore, the prices p of coats that the shopper can buy must satisfy the inequality 175 < p ≤ 430

Step-by-step explanation:

I am seeking friends , add me on sn ap = m_oonlight781 and we can do school stuffs togetherwaiting

The surface area of the cylinder with a radius of 8 in and height of 6 in is 224π square inches.

The surface area of the cylinder is the total sum of the lateral surface area and the two cross-section area.

The formula for the surface area of a cylinder is:

SA = 2πr² + 2πrh

where r is the radius and h is the height.

Plugging in the given values, we have:

SA = 2π(8²) + 2π(8)(6)

SA = 2π(64) + 2π(48)

SA = 128π + 96π

SA = 224π

Therefore, the surface area of the cylinder with a radius of 8 in and height of 6 in is 224π square inches.

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These probabilities may be given in the problem statement or may need to be estimated based on past data or assumptions. Once we have these probabilities, we can use the multiplication rule to calculate the joint probability.

To find the probability that the next driver will use entrance 1 and park for more than two hours, we can use the multiplication rule of probability.

The multiplication rule states that the probability of two independent events occurring together is the product of their individual probabilities. In this case, the two events are:

The driver uses entrance 1

The driver parks for more than two hours

Let P(E1) be the probability that the next driver uses entrance 1, and let P(MT2) be the probability that the next driver parks for more than two hours.

Then, the probability that both events occur together is given by:

P(E1 and MT2) = P(E1) × P(MT2)

So, to find the probability that the next driver will use entrance 1 and park for more than two hours, we need to know the individual probabilities of these events.

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To solve this problem, we need to use the formula for the volume of a cube, which is V = s^3, where s is the length of one side of the cube. We also need to use the chain rule of differentiation. We know that the side of the cube is decreasing at a constant rate of 2 inches per minute. This means that ds/dt = -2 (negative because it is decreasing).

1. We know that the side of the cube is decreasing at a constant rate of 2 inches per minute. This means the rate of change of the side length is -2 inches per minute (negative since it's decreasing).

2. Let's represent the side length of the cube as s and the volume as V. The volume of a cube can be calculated using the formula V = s^3.

3. We are asked to find how fast the volume is decreasing when the volume is 10 cubic inches. First, let's find the side length when the volume is 10 cubic inches:
10 = s^3 => s = (10)^(1/3) ≈ 2.154 inches

4. Now we need to find the rate of change of the volume, dV/dt, with respect to time. We'll do this by taking the derivative of the volume equation with respect to time and using the chain rule:
dV/dt = d(s^3)/dt = 3s^2 * ds/dt

5. We know that ds/dt = -2 inches per minute and s ≈ 2.154 inches. Plug in these values to find dV/dt:
dV/dt = 3 * (2.154)^2 * (-2) ≈ -26.5 cubic inches per minute

So, when the volume of the cube is 10 cubic inches, the volume is decreasing at a rate of approximately 26.5 cubic inches per minute.

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Answer:

ROI = 10%

Return in dollar value = $500

Step-by-step explanation:

To calculate the return on investment (ROI) when buying 250 shares of stock for $5000 and selling it one year later for $5500, we need to first calculate the gain and then compute the ROI.

The gain from this transaction is the difference between the selling price and the purchase price:

Gain = Selling price - Purchase price

Gain = $5500 - $5000

Gain = $500

To calculate the ROI, we can use the following formula:

ROI = (Gain / Investment) x 100%

Substituting the values in the above formula, we get:

ROI = ($500 / $5000) x 100%

ROI = 10%

Therefore, the ROI for this transaction is 10%.

To calculate the return in dollar value, we simply subtract the purchase price from the selling price:

Return in dollar value = Selling price - Purchase price

Return in dollar value = $5500 - $5000

Return in dollar value = $500

Therefore, the return in dollar value from this transaction is $500.

The probability that Delta Airlines will receive no complaints on a given day is approximately 0.082 or 8.2%.

If the average number of complaints per day is 2.5, we can model the number of complaints as a Poisson distribution with a rate parameter of λ = 2.5.

The Poisson distribution gives the probability of observing k events in a given time interval, given the average rate of occurrence of those events. The probability of observing k events is given by the formula:

P(k events) = [tex](e^(-λ) * λ^k) / k![/tex]

where e is the mathematical constant approximately equal to 2.71828.

To find the probability that Delta Airlines will receive no complaints on a given day, we set k = 0 in the formula:

P(0 events) = [tex](e^(-2.5) * 2.5^0) / 0![/tex]

P(0 events) = [tex](e^(-2.5)) / 1[/tex]

P(0 events) = 0.082

So the probability that Delta Airlines will receive no complaints on a given day is approximately 0.082 or 8.2%.

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The probability that Delta Airlines will receive no complaints on a given day is approximately____________

30% Chance to land on yellow

You gotta add all the colors and then divide the percent you want (in this case the number of times on yellow) and divide it by the total

The concept of permutations is commonly used in statistics to measure the probability of observing a certain result or outcome when rearranging a set of objects. In this case, you are aiming to generate 10,000 permutations and test a specific alternative hypothesis.

The p-value is a statistical measure that indicates the likelihood of obtaining the observed result (or a more extreme one) assuming that the null hypothesis is true. It ranges from 0 to 1, where a smaller p-value suggests stronger evidence against the null hypothesis.

Without more information about the specific tool or hypothesis you are using, I cannot provide an exact answer to your question. However, once you have generated the permutations and selected the alternative hypothesis, the p-value should be displayed in the output or result section of the tool. It may also be helpful to consult a statistical textbook or resource to understand the interpretation and significance of the p-value in your particular analysis.

1. Select the number of permutations to be equal to 10,000.
2. Click on "Generate Permutations."
3. Ensure that the correct alternative hypothesis is selected (this will depend on your specific test; it can be one-sided or two-sided).
4. Observe the results of your permutation test, which should include the p-value.

Unfortunately, I cannot provide you with the p-value without knowing the specific data and hypothesis you are working with. Please follow the steps above using your software or tool, and you should obtain the p-value you are looking for.

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Answer: Yes, No, No, No, No

Step-by-step explanation:

We cannot find the 90% confidence interval for all first-year students at the university that will be traveling to and from campus by train with the given information.

In mathematics, an interval is a set of real numbers that includes all the numbers between two given values. More formally, an interval is a connected subset of the real number line. Intervals are commonly represented using brackets or parentheses. For example, [a,b] represents the closed interval from a to b, including both endpoints, while (a,b) represents the open interval from a to b, excluding both endpoints. Half-open intervals, such as [a,b) or (a,b], include one endpoint and exclude the other.

Intervals play a crucial role in mathematical analysis, calculus, and many other areas of mathematics. They are used to define functions, measure lengths, and study the behavior of mathematical objects over a range of values. Intervals also have important applications in physics, engineering, and other sciences.

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Answer:

asd

Step-by-step explanation:

asd

Answer:7 and a half

Step-by-step explanation:

The conversion result of decimal numbers to hexadecimal representations of 2's complement numbers are the following

a) 100

b) 6F

c)75BCD15

d)FFFFFF04

A decimal number can be represent the two parts one is whole and a fractional part separated by a decimal point. The decimal point is represented by dot inbetween the whole and fractional part. Hexadecimal is one of number system with base 16. That means 16 possible digits used to represent numbers. Steps to convert a decimal number to hexadecimal number :

Representations of 2's complement numbers :

a) decimal number = 256

using above rules, it's hexadecimal representations of 2's complement numbers is 100.

b) decimal number = 111

it's hexadecimal representations of 2's complement numbers is 6F.

c) decimal number = 123,456,789

it's hexadecimal representations of 2's complement numbers is 75BCD15.

d) decimal number = -44

it's hexadecimal representations of 2's complement numbers is FFFFFF04.

Hence, required values are obtained.

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To satisfy the given criteria of a 100% rise time being as small as possible and no greater than 3 seconds, you can implement various techniques in the system design process. These include:

1. Selecting appropriate components: Choose components with faster response times, such as low time constant capacitors and inductors, and high-speed operational amplifiers or microcontrollers.

2. Optimizing the system layout: Minimize the lengths of signal traces and wiring to reduce parasitic capacitance and inductance, which can slow down the system response.

3. Using feedback control: Implement a feedback control system to monitor the output and adjust the input accordingly, ensuring the output reaches the desired level within the specified rise time.

4. Employing filtering techniques: Apply appropriate filters to remove unwanted noise and improve the signal-to-noise ratio, which can help the system respond more rapidly to input changes.

5. Utilizing simulation and testing: Test and simulate your system design to identify any areas that may be causing a slower rise time. Make necessary adjustments to the design to optimize performance.

By following these techniques, you can achieve a 100% rise time that is as small as possible and no greater than 3 seconds, meeting the desired criteria for your system.

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To solve this problem, we need to find a common denominator for 5/8 and 3/12.

The prime factorization of 8 is 2 x 2 x 2, and the prime factorization of 12 is 2 x 2 x 3.

A common denominator for 5/8 and 3/12 is the least common multiple (LCM) of 8 and 12, which is 24 (2 x 2 x 2 x 3).

We can convert both fractions to have a denominator of 24 as follows:

5/8 = (5/8) x (3/3) x (3/3) = 15/24

3/12 = (3/12) x (2/2) x (4/4) = 6/24

Now we can add the fractions:

15/24 + 6/24 = 21/24

We can simplify this fraction by dividing both the numerator and denominator by their greatest common factor, which is 3:

21/24 = (21/3) / (24/3) = 7/8

Therefore, 5/8 + 3/12 = 7/8.

The answer is (B) 7/8.

Answer:

B 7/8

Step-by-step explanation:

showed work in the picture