For this case we have an equation of the form:

Where,
h0: initial height
v0: initial speed
a: acceleration
Substituting values we have:

Rewriting we have:

Note: see attached image
Answer:
Answer:3/4 miles per hour
Step-by-step explanation:
Simplify the fraction 20/15 to get 3/4 per hour or 0.75 miles per hour
The answer to this is 67.00
Corresponding angles are angles that are equal in degrees and in this case it is <8 and <4 but there is also <5 and<7.