80% of 7.5 is 6.
so if he travelled 80% further, it would be 7.5+6 which is
13.5
8 t ^ 2 + 4 t ^ 2 - 8 4 t
I'd say angle A = angle B
arc tangent (angle B) = 150 / 555
<span><span><span>arc tangent (angle B) = 0.2702702703
</span>
angle B = 15.124 degrees
By the way 555 feet is the height of the Washington Monument.
</span>
</span>
The answer for c would be 805
