If anyone is good at right triangle trig word problems please help

The height of the hill is 131ft

See explanation in the photo

Step-by-step explanation:

Refer to attached picture

Let the base is b and the height of the hill is x.

For the smaller triangle we have:

And for the bigger triangle:

Solve both equations for b:

Eliminate b and get the values of tan, solve for x:

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)