Question

Circle Phas a circumference of approximately 75 inches.

What is the approximate length of the radius, r? Use 3.14 for T. Round to the nearest inch.
12 inches
24 inches
38 inches
46 inches

Answer 1

The Answer is 12

Explanation:

Answer 2

12 inches

First choice

Explanation:

Solve using the formula for circumference.

C = 2πr

"C" is the circumference, which we know C = 75 in.

π = 3.14 in this problem.

"r" is the radius, which we are finding.

Substitute the numbers you know for the variables of the formula.

C = 2πr

(75in) = 2(3.14)r

Since we are finding "r", we need to isolate it. If we divide the right side by 2(3.14), it cancels out and "r" will be alone.

`(75in)/(2*3.14) = (2*3.14*r)/(2*3.14)`

`(75in)/(2*3.14) = r`

Put the variable on the left side for standard formatting.

`r = (75in)/(2*3.14)` Now simplify the fraction.

`r = (75in)/(6.28)` 2 times 3.14 is 6.28

`r = (75in)/(6.28)` Divide the top by the bottom

r = 11.9426752 in Exact decimal answer

r ≈ 12in Rounded answer to nearest inch