Solve the problem.Find the center of mass of the hemisphere 
if the density is proportional to the distance from the center.
A. 
B. 
C. 
D. 
Answer: A
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Find the angle between u and v in radians.u = -5i - 7j, v = 9i + 10j + 5k
A. 1.99 B. 2.77 C. -1.20 D. 1.58
Solve the problem.The velocity of a body of mass m falling from rest under the action of gravity is given by the equation 
where k is a constant that depends on the body's aerodynamic properties and the density of the air, g is the gravitational constant, and t is the number of seconds into the fall. Find the limiting velocity, limt?? v, of a 150 lb. skydiver (mg = 150) when k = .006.
A. 50.00 ft/sec B. 0.01 ft/sec C. 158.11 ft/sec D. There is no limiting speed.
Answer the question.The following statement would be considered a step in solving an applied problem. True or false?Translate the problem into an equation.
A. False B. True
Solve using a proportion. Round your answer to the nearest hundredth when necessary.It takes Fred 12 minutes to type and spell check 10 pages. Find how many pages he can type and spell check in 4.5 hours. Round answer to the nearest tenth if necessary.
A. 324.0 pages B. 45 pages C. 375.0 pages D. 225.0 pages