Solve the problem.One pump can drain a pool in 10 minutes. When a second pump is also used, the pool only takes 9 minutes to drain. How long would it take the second pump to drain the pool if it were the only pump in use?
A. 4
minutes
B. 
minute
C. 89 minutes
D. 90 minutes
Answer: D
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Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of hydrogen sulfide dissolved in a solution, measured in parts per million (ppm), is related to the elapsed time measured from the beginning of the step. Use the following table as a representation of this relationship. Write the data from the table as ordered pairs (x, y), where x represents the time and y represents the amount dissolved.
A. (1, 22.0), (2, 24.4), (3, 26.4), (4, 28.4), (5, 30.2) B. (4, 22.0), (8, 24.4), (12, 26.4), (16, 28.4), (20, 30.2) C. (0, 22.0), (4, 24.4), (8, 26.4), (12, 28.4), (16, 30.2) D. (22.0, 4), (24.4, 8), (26.4, 12), (28.4, 16), (30.2, 20)
Give three kinds of notation for the percent.57%
A. 
; 57 × 
; 57 × 0.001
B. 
; 57 × 
; 57 × 0.1
C. 
; 57 × 
; 57 × 0.01
D. 
; 57 × 
; 57 × 0.01
Solve the problem.Decide which of the rational functions might have the given graph. 
A. R(x) = 
B. R(x) = 
C. R(x) = 
D. R(x) = 
Select the best estimate of the specified quantity.The quotient 9546.9 ÷ 98.6
A. 10000 B. 10 C. 100 D. 1000