Answer:
A. 54°
Step-by-step explanation:
Angles in a triangle add up to 180 degrees.
y + y + 72 = 180
2y + 72 - 72 = 180 - 72
2y = 108
(2y)/2 = 108/2
y = 54
![h(t)=4-t^2](https://tex.z-dn.net/?f=h%28t%29%3D4-t%5E2)
It's a quadratic function therefore the domain
D = R (any real number).
Yes that answer is accurate