41. A. 30
42. 148 because supplementary angles equal 180
I believe it’s: 8.992254284692088
In order to find the volume of the tank, you just need to use this formula :
V = π r^2 h
r = 101.5 ft (half the diameter)
h = 25 ft
V = π (101.5)^2 x 25
= 809462.5 ft^3
hope this helps
