I need help solving the b portion of the equation.

Question

15. Assume that a surveyor stands at the top of a mountain that is “h” feet tall. If the distance (in feet) that he can see is defined by d = 3200.2 SQRT(h), then answer the following. (a) How far can the surveyor see from the top of a 2000-foot mountain? (b) How tall is the mountain, if the surveyor can see 15 miles? (Note: 1 mile equals 5280 feet.)

Answer 1

I would really appreciate help...tahnkys

Answer 2

for b)
d = 15 miles, so

15(5280) = 3200.2√h
24.74845 = √h
612.5 = h

so the mountain is 612.5 feet high.

Answer 3

Thank you