Find the exact value of the expression.
A. -2
B. - 
C. -
D. - 
Answer: D
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Solve the problem.The owner of a video store has determined that the average daily cost, in dollars, of operating the store is given by 
where x is the number of videos rented. Find the cost at the vertex of the parabola (the minimum cost). Round your answer to the nearest dollar.
A. $262 B. $406 C. $478 D. $622
Solve the problem.The formula v = 
can be used to estimate the speed of a car, v, in miles per hour, based on the length, L, in feet, of its skid marks upon sudden braking on a dry asphalt road. If a car is involved in an accident and its skid marks measure 45 feet, at what estimated speed was the car traveling when it applied its brakes just prior to the accident?
A. 40 mph B. 35 mph C. 25 mph D. 30 mph
Provide an appropriate response.The solution of x2 - 5x - 14 < 0 is
A. x < -2, x > 7 B. x > 7 C. -2 < x < 7 D. x < -2 E. all real numbers
Solve the problem.Noah and Ben are running in the Walker Street Fun Run. Noah runs at 7 mph, Ben at 5 mph. If they start at the same time, how long (in minutes) will it be before they are 
mile apart?
A. 10 min B. 6 min C. 24 min D. 150 min