Solve.A ball is thrown downward with an initial velocity of 28 meters per second from a cliff that is 
high. The height of the ball is given by the quadratic equation 
where h is in meters and t is the time in seconds since the ball was thrown. Find the time that the ball will be 
from the ground. Round your answer to the nearest tenth of a second.
A. 3.9 sec
B. 2.8 sec
C. 3.0 sec
D. 2.9 sec
Answer: D
Mathematics
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Solve the problem.The number of students in a school in year n is estimated by the model
. About how many students are in the school in each of the first three years?
A. 109, 132, 170 B. 104, 132, 155 C. 104, 132, 170 D. 117, 145, 183
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Find area of figure. Round to the nearest hundredth if necessary.
A. 143 yd2 B. 572 yd2 C. 242 yd2 D. 286 yd2
Mathematics
Evaluate the expression.18 + (-1) - (-4)
A. -21 B. 15 C. 21 D. 13
Mathematics
Solve the problem.Suppose that the velocity of a falling body is v = ks2 (k a constant) at the instant the body has fallen s meters from its starting point. Find the body's acceleration as a function of s.
A. a = 2ks2 B. a = 2ks3 C. a = 2k2s3 D. a = 2ks
Mathematics