Solve. Round your answer to the nearest tenth, if necessary.An object is thrown upward from the top of a 
building with an initial velocity of 48 feet per second. The height, h, of the object after t seconds is given by the quadratic equation 
When will the object hit the ground?
A. In 5 seconds
B. In 160 seconds
C. In 2 seconds
D. In 7 seconds
Answer: A
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Evaluate the integral using the given substitution.
dx, u = 10x2
A. 
sin (10x2) + C
B. sin(10x2) + C
C. 
sin (10x2) + C
D. 
sin (u) + C
Find the volume of the solid generated by revolving the region about the y-axis.The region enclosed by x = 
, x = 0, y = - 3, y = 3
A. 
?
B. 
?
C. 
?
D. 6?
Solve the problem.A rotating beacon is located a distance d from a long wall. The distance d is given byd = 4 tan 2?t,where t is the time measured in seconds since the beacon started rotating. Solve the equation for t.
A. t = 
tan 
B. t = 2? arctan 
C. t = 
arctan 
D. t = 2? tan 
Solve the right triangle with the given sides and angles.a = 2.4 cm, b = 1.9 cm
A. ? = 51.6°, ? = 38.4°, c = 3.1 cm B. ? = 52.3°, ? = 37.7°, c = 4.3 cm C. ? = 38.4°, ? = 51.6°, c = 3.1 cm D. ? = 47.1°, ? = 42.9°, c = 3.1 cm