Question

You blow a bubble in the shape of a sphere. It has a radius of 5 inches. Which choice is closest to its surface area? Use 3.14 to approximate pi.

Answer 1

Surface area  = 4 pi r^2  = 4*3.14*5^2 = 314 in^2

Answer 2

since the surface area of a regular sphere is

`4\pi * r {}^(2)`
and the radii for the spherical bubble is 5 inches, then the answer to the following question would be:


`4 * \pi * 25 \\ = 314.159`