Solve the problem.A projectile is thrown upward so that its distance above the ground after t seconds is 
After how many seconds does it reach its maximum height?
A. 18 sec
B. 36 sec
C. 27 sec
D. 9 sec
Answer: A
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Solve the problem.The time t, in minutes, needed for clothes hanging on a line outdoors to dry, at a specific temperature and wind speed, depends on the humidity, h. The time can be approximated by the equation 
where h is the humidity expressed as a decimal number. Find the length of time required for clothing to dry if there is 31% humidity. Round your answer to 2 decimal places.
A. 64.99 min B. 65.78 min C. 63.56 min D. 66.22 min
Solve the problem.Henry must place cones along the side of a parking lot at 10-foot intervals. If the side is 150 feet long, how many cones will Henry need if none are placed at the ends of the lot?
A. 9 B. 16 C. 14 D. 10
Find the absolute value of the complex number.z = -4
A. -16 B. -4 C. 16 D. 4
Find the midpoint of the segment with the given endpoints.(
, -5) and (
, 1)
A. 
B. 
C. 
D. 