Question

what is the suface area of a hemisphere with a diameter of 14

Answer 1

SA=4(pi)r^2
SA=4(pi)(7)(7)
SA=615.7521601 sq. units

Now divide the SA by half cause a hemisphere is half a sphere.

615.752... sq units / half = 307.876...sq. units

307.876...sq. units  is your final answer!