Question

The area of a circle with radius r is given by nr^2. The area of a circle is 16 square units. What is the radius of the circle? A r = 16*piB. r= 16*nC. r=4 Dr = r = 4*pi

Answer 1

EXPLANATION

If the area of a circle with radius r is given by nr^2 and the area of a circle is 16 square units.

So, the radius of the circle is as follows:

$16=nr^2$

Isolating r:

$r=\sqrt[]{\frac{16}{n}}=\frac{4}{\sqrt[]{n}}=\frac{4}{\sqrt[]{1}}=4$

So, the radius is 4 units because in this case, n is equal to 1, so sqrt(1) is zero.