Question

What is the surface area of a sphere that has a diameter of 1.5 in.? A) 7.07 in.2 B) 8.64 in.2 C) 18.84 in.2 D) 28.26 in.2

Answer 1

Hello!

To find the surface area of a sphere you use the equation

$A = 4 \pi r^{2}$

A is surface area
r is radius

Put in the values you know and 3.14 for pi

$A = 4 * 3.14 * 1.5^{2}$

Square the number

A = 4 * 3.14 * 2.25

Multiply

A = 28.26

The answer is D)28.26in squared

Hope this helps!