Solve the problem.The distance it takes to stop a car varies directly as as the square of the speed of the car. If it takes 112 feet for a car traveling at 40 miles per hour to stop, what distance is required for a speed of 
per hour?
A. 235.48 ft
B. 235.82 ft
C. 247.78 ft
D. 201.84 ft
Answer: A
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Solve the problem.A rectangular carpet has a perimeter of 190 inches. The length of the carpet is 61 inches more than the width. What are the dimensions of the carpet?
A. length: 73 in.; width: 56 in. B. length: 95 in.; width: 86.5 in. C. length: 95 in.; width: 78 in. D. length: 78 in.; width: 17 in.
Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 750e-0.144t, where t is the time in years? Round to the nearest hundredth year.
A. 50.79 yr B. 4.81 yr C. 108.00 yr D. 45.97 yr
Simplify. Assume that any variables are positive.
A. 8
B. 
C. 
D. 33p
Divide and write the answer in simplest form.-2.7 ÷ 0.03
A. 
B. -2.67
C. -26.7
D. -90