Find the particular solution of the differential equation.2 
- 4xy = 8x; y = 6 when x = 0
A. y = -2 + 8e-x2
B. y = 2 + 6ex2
C. y = -1 + 7ex2
D. y = -2 + 8ex2
Answer: D
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Solve for the indicated variable.S = 2?rh + 2?r2 for h
A. h = S - r
B. h = 
- 1
C. h = 2?(S - r)
D. h = 
Two pipes are used to fill a water storage tank. The first pipe can fill the tank in 8 hours, and the two pipes together can fill the tank in 4 hours less time than the second pipe alone. How long would it take for the second pipe to fill the tank? ?
A. 8 hours B. 16 hours C. 12 hours D. 15 hours E. 4 hours
Solve the problem.An experiment is done to determine which of two cleaners cleans better. Twelve lab technicians test each kind of cleaner and give it a rating from 1 to 10. The results are in the two tables below. Which type of cleaner is better? Cleaner X Cleaner Y9 6 7 6 6 7 7 26?2?9?6?2?6?6?26?6?7?2?6?2?9?6
A. Cleaner Y B. Cleaner X
Solve the problem.A man rode a bicycle for 12 miles and then hiked an additional 8 miles. The total time for the trip was 5 hours. If his rate when he was riding a bicycle was 10 miles per hour faster than his rate walking, what was each rate?
A. Bike: 13 mph Hike: 3 mph B. Bike: 12 mph Hike: 2 mph C. Bike: 11.5 mph Hike: 1.5 mph D. Bike: 14.5 mph Hike: 4.5 mph