Question

A circular foundation has a radius of 9.4 feet. Find it's diameter and circumference to the nearest tenth

Answer 1

The diameter in a circle is twice the radius which is 18.8 in this situation.

Circumference is 2 * π * r

just substitute the values In geometry they use 3.14 for pi sometimes
so it would be 2 * 3.14* 9.4
= 59.03

Answer 2

The diameter of the circular foundation would be 18.8 feet, and the circumference would be 59.1 feet.