Answer:
70.9°
Step-by-step explanation:
Hypotenuse = 20
Leg = 18.9
We will need to use Sin to find the angle since the given leg is opposite of the angle of elevation.
[tex]sin^{-1} ( \frac{Leg}{Hypotenuse} )[/tex]
[tex]sin^{-1} ( \frac{18.9}{20} ) = 70.9[/tex]