Solve the problem.If a rocket is propelled upward from ground level, its height in meters after t seconds is given by 
During what interval of time will the rocket be higher than 411.6 m?
A. 12 < t < 13
B. 7 < t < 12
C. 6 < t < 7
D. 0 < t < 6
Answer: C
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Use differentiation to determine whether the integral formula is correct.
dx = - 
+ C
A. Yes B. No
Solve the problem.A hiker wants to know the height of a cliff. She finds that the angle of elevation from her current position to the top of the cliff is 24.6°. She then hikes 171 feet towards the cliff (in a straight line) and finds that the angle of elevation from her new position is 57.6°. How tall is the cliff? Round your answer to the nearest hundredth of a foot when necessary.
A. 110.35 ft B. 115.47 ft C. 112.65 ft D. 106.9 ft
Solve the problem.Use a tangent function to estimate the grade resistance of a 
car travelling on a -2.9° grade. Round your answer to the nearest pound.
A. 253 pounds B. -616 pounds C. -308 pounds D. -127 pounds
Identify the polygon as a triangle, quadrilateral, pentagon, hexagon, or octagon.
A. hexagon B. triangle C. quadrilateral D. pentagon