4.
2(10) + 2(x) = 37
20 + 2x = 37
2x = 17
x = 8.5
5.
V=pi r^2 h
A
2009.6 = pi r^2 10
divide by 10
200.96 = pi r^2
divide by pi
64 = r^2
r = 8
B
196.25 = pi r^2 10
same as A
r = 2.5
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