Use cylindrical shells to find the volume of the solid.
A sphere of radius r.
b. 
Mathematics
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Solve the problem.A semicircular plate
in diameter sticks straight down into fresh water with the diameter along the surface. Find the fluid force exerted by the water on one side of the plate.
A. 22,744.8 lb B. 68,234.4 lb C. 45,489.6 lb D. 30,326.4 lb
Mathematics
Solve for x in the proportion. If possible, reduce the known fraction first.
= 
A. x = 
B. x = 
C. x = 
D. x = 
Mathematics
Graph the curve whose parametric equations are given.x = t2, y = 
+ 4; 0 ? t ? 4 
A. 
B. 
C. 
D. 
Mathematics
Multiply.-20(-10)
A. 200 B. 220 C. 210 D. -220
Mathematics