Joe is hiking in national park wilderness. His radio transmits signals as far as the horizon. Use the formula d =Square root/1.5h , where d is the line-of-sight distance to the horizon in miles and h is height in feet.

Joe sets his receiver on the ground. What is the farthest away that a transmitter 4 ft above the ground can be in order to reach Joe?


a.

0 mi

c.

2.4 mi

b.

1.2 mi

d.

6 mi