Answer:
a: 500in squared
Step-by-step explanation:
A=(a+b)/2 x h.
19+31=50
50/2=25
25×20=500
The 3rd one (y_< 2/3 x + 1/5) If this helps please mark brainiest! :)
20x3.14=62.8 62.8x10=628 Volume=628inches
Plz give me brainlist