Solve the problem.A rock falls from a tower that is 147 m high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground 
Round to the nearest tenth, if necessary.
A. 11.9 sec
B. 4410 sec
C. 12.1 sec
D. 5.5 sec
Answer: D
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Solve the system of equations graphically. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent of dependent. 3x - 2y = 4-6x + 4y = 7
A. Infinitely many solutions, dependent
B. (1, 2)
C. No solution, inconsistent
D. (2, 1)
Solve the problem.A truck driver started a trip at an average speed of 70 miles per hour. Once snow began to fall, he had to drop his speed to 50 miles per hour. It took him 14.2 hours to reach his destination, which was 804 miles away. How many hours after the driver started did the snow begin to fall?
A. 4.5 hr B. 4.7 hr C. 9.5 hr D. 9.7 hr
Solve the problem.The supply function for a certain car is given by p = 31(3q) cars, where p dollars is the price per car and q is the quantity of cars, in thousands, supplied at that price. What quantity will be supplied if the price is $67,797 per car?
A. 8 thousand cars B. 6 thousand cars C. 7 thousand cars D. 9 thousand cars
Solve the problem using the normal curve approximation to the binomial distribution.In one county, the conviction rate for speeding is 85%. Estimate the probability that of the next 100 speeding summonses issued, there will be at least 90 convictions.
A. .3962 B. .0420 C. .8962 D. .1038