Question

7^2*3.14*a=1077.02 What is a?

Answer 1

$7^{2} * 3.14 * a =1077.02$
$49 * 3.14 * a =1077.02$
$153.86 * a =1077.02$
$153.86 / 1077.02 = 7$
$a=7$

Answer 2

A =7

7^2*3.14*7 sorry I did the equation wrong at first