Solve.A ball is thrown downward with an initial velocity of 14 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 it takes the ball to hit the ground. Round your answer to the nearest tenth of a second.
A. 1.4 sec
B. 2.4 sec
C. 1.5 sec
D. 1.3 sec
Answer: A
Mathematics
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Solve the problem.Find the center of mass of the lamina in the first quadrant bounded by the coordinate axes and the curve 
if 
.
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
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Find the product and write the answer in simplest form. Assume variables represent nonnegative values.
? 
A. 
B. 
C. 
D. 
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Use a proportion to solve the problem.On a map of the Thunderbird Country Club golf course, 0.5 inches represent 15 yards. How long is the 4th hole if the map shows 5.5 inches?
A. 82.5 yd B. 165 yd C. 1.4 yd D. 41.25 yd
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Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
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