PLEASE HELP!

A submarine periscope has a viewing distance of d = 1.5h, where h is the height in feet above the
water and d is the viewing distance measured in miles. To the nearest foot, how many feet above the
water would the periscope have to be to see a ship 6 miles away?
A. 4
B. 8
C. 24
D. 16

PLEASE HELP A submarine periscope has a viewing distance of d 15h where h is the height in feet above the water and d is the viewing distance measured in miles class=