Question

What is the best approximation of the length of the radius in a circle with an area of 16pi x in ^ 2 ?

Answer 1

4in = r

Explanation:

Different problem if the x was a variable in the question

formula for area of circle = pi x r^2.

So if the area of a circle is 16 pi in^2, it would be an obvious estimate that the radius is the square root of 16 which is 4 inches.

If the x was a variable, you would find the square root of 16x which is
`√(16x)` which would make it 4
`√(x)` as the radius.