Question

Circle Phas a circumference of approximately 75 inches.

Answer 1

Answer:

12 inches

First choice

Step-by-step 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.

$\frac{75in}{2*3.14} = \frac{2*3.14*r}{2*3.14}$

$\frac{75in}{2*3.14} = r$

Put the variable on the left side for standard formatting.

$r = \frac{75in}{2*3.14}$         Now simplify the fraction.

$r = \frac{75in}{6.28}$      2 times 3.14 is 6.28

$r = \frac{75in}{6.28}$         Divide the top by the bottom

r = 11.9426752 in              Exact decimal answer

r ≈ 12in              Rounded answer to nearest inch

Answer 2

Answer:

12 inches

Step-by-step explanation: