Question

Use the formula A/π=r to find the length of the radius if the area is 25 square centimeters. Show your work, rounding your final answer to the nearest tenth of a centimeter.

a) 2.8 cm
b) 3.2 cm
c) 4.5 cm
d) 5.1 cm

Answer 1

To find the length of the radius, the formula A/π=r can be rearranged to solve for r. Dividing the area by π will give us the length of the radius, which can be rounded to the nearest tenth.

Step-by-step explanation:

To find the length of the radius using the formula A/π=r, we can rearrange the formula to solve for r. We already know the area is 25 square centimeters, so we plug that into the formula:

25/π=r

Now, we divide 25 by the value of π (approximately 3.14159) to find the length of the radius:

25/3.14159≈7.9577

Rounding to the nearest tenth, the length of the radius is approximately 7.96 centimeters. Therefore, the correct answer is not given in the options provided.