Solve the problem.If a ball is thrown upward at 19.6 meters per second from the top of a building that is 70 meters high, the height of the ball can be modeled by 
meters, where t is the number of seconds after the ball is thrown. What is the ball's maximum height?
A. 70 m
B. 128.8 m
C. 84.7 m
D. 89.6 m
Answer: D
Mathematics
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Provide an appropriate response.
Perform the indicated multiplication and division. Express your answer in scientific notation: 
A. 5.76 × 100 B. 6.5 × 1010 C. 5.76 × 1010 D. 5.76 × 10-10
Mathematics
Write the following as an algebraic expression in u, u > 0.cos(arctan u)
A. u
B. 
C. 
D. 
Mathematics
Simplify.
A. - 
B. 
C. - 
D. - 
Mathematics
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.If the speed of light is 3.00 ×108m/sec, how long does it take light to travel 2.29 × 1011 m, the distance from the sun to Mars? Round to one decimal place.
A. 7.6 × 102 min B. 76 sec C. 7.6 × 103 sec D. 7.6 × 102 sec
Mathematics