Answer:
I can't be simplified because it is already in it's simplified form.
Step-by-step explanation:
pi times radius equals the area of a circle
Answer:
b. 44°
Step-by-step explanation:
Reference angle = x
Hypotenuse = 21
Adjacent = 15
Apply trigonometric function CAH:



x = 44.4153086° ≈ 44° (nearest degree)