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2 years ago

Solve the formula for the indicated variable. A = 4πr² for r when r > 0 r =

Mathematics

2 answers:

SashulF [63]2 years ago

8 0

Answer:

√(A/4π) = r

Step-by-step explanation:

A = 4πr²

r² = A/4π

r = √(A/4π)

77julia77 [94]2 years ago

4 0

Answer:

r = $\sqrt{\frac{A}{4\pi } }$

Step-by-step explanation:

Given

A = 4πr² ( isolate r² by dividing both sides by 4π )

r² = $\frac{A}{4\pi }$

Take the square root of both sides

r = $\sqrt{\frac{A}{4\pi } }$

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Help me find the area :)

Andreas93 [3]

Answer:

20.625 ft²

(hope this is right :)

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2 years ago

Stanley has a collection of seashells. He found 35% of his collection on Florida beaches. If Stanley has 49 seashells from Flori

m_a_m_a [10]

Answer:

The number of seashells he have in his collection all together is <u>140</u>.

Step-by-step explanation:

Given:

Stanley has a collection of seashells. He found 35% of his collection on Florida beaches.

Stanley has 49 seashells from Florida.

Now, to find the number of seashells of his collection altogether.

Let the number of seashells all together be $x.$

Percentage of seashells found on Florida beaches = 35%.

Number of seashells found on Florida beaches = 49.

Now, to get the number of seashells altogether we put an equation:

$35\%\ of\ x=49.$

⇒ $\frac{35}{100} \times x=49$

⇒ $0.35\times x=49$

⇒ $0.35x=49$

Dividing both sides by 0.35 we get:

⇒ $x=140.$

Therefore, the number of seashells he have in his collection all together is 140.

4 0

2 years ago

Coretta is covering her locker door with crate paper. The door is shaped like a rectangle and has an area of 192 square inches.

Reika [66]

I think it’s C I’m not sure

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2 years ago

Read 2 more answers

On a map, the distance between two towns is 2. 5 inches, and 1 inch represents 6 miles. What is the actual distance between the

Aleks04 [339]

Answer:

15 miles

Step-by-step explanation:

1/2 inch = 3 miles

1 inch = 6 miles

2 inches = 12 miles

2.5 inches = 15 miles

8 0

1 year ago

Judy just calculated the standard deviation for a project she is working on. The value for the standard deviation is a small num

Contact [7]

Answer: b) The data is spread close to the mean

Step-by-step explanation: Theoretically, when the standard deviation of a statistical data is large or high, it simply means that the values in such statistical data set are farther away from the mean, On the other hand when the standard deviation is small or low, it simply means that the values of such statistical data are close to the mean of those data on average.

Therefore Judy's low standard deviation for her project simply indicates that her statistical data set is spread close to the mean.

7 0

2 years ago