Find the surface area of a sphere with a diameter of 40 inches. Use 3.14 for pi.

Answer 1

To find the surface area of a sphere, you can use the formula:

Surface Area = 4 * π * r^2

where r is the radius of the sphere.

Since the diameter of the sphere is given as 40 inches, the radius (r) will be half of the diameter:

r = Diameter / 2 = 40 inches / 2 = 20 inches

Now plug this value into the formula:

Surface Area = 4 * π * (20 inches)^2
= 4 * 3.14 * (400 square inches) [since 20^2 = 400]
= 4 * 3.14 * 400
= 12.56 * 400
= 5024 square inches

So, the surface area of the sphere is 5024 square inches using 3.14 for pi.