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

$4 \times \pi \times 25 \\ = 314.159$