Divide.
A. - 
B. 17
C. -27
D. -17
Answer: D
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Solve the problem.A pendulum is released and swings until it stops. If it passes through an arc of 35 inches the first pass, and if on each successive pass it travels 
the distance of the preceding pass, how far will it travel before stopping?
A. 8.75 in. B. 52.5 in. C. 43.75 in. D. 78.75 in.
Solve the problem.Karin biked at 15 mph for a time but got a flat tire. She then walked at 2 mph. She traveled a total of 96 miles. Had she biked the whole time, she would have gone 135 miles. How many hours did she walk?
A. 6 hr B. 2 hr C. 4 hr D. 3 hr
Solve by the substitution method. x + y = 76x + 6y = 42
A. {(0, 0)} B. {(5, 2)} C. {(x, y)| x + y = 7} D. ?
Solve the problem.A nuclear scientist has a sample of 
of a radioactive material which has a half-life in hours. She monitors the amount of radioactive material over a period of a day and obtains the following data. Use a graphing utility to fit an exponential function to the data. Predict the amount of material remaining at 40 hours.
.
A. y = 86e-0.071x, 5.0 mg B. y = 100e-0.077x, 4.6 mg C. y = 92e-0.0686x, 5.9 mg D. y = 100e-0.077x, 6.7 mg