Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of chlorine 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. What does the ordered pair (9, 28.4) mean in the context of this situation?
A. (9, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 15 minutes elapsed.
B. (9, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 9 seconds elapsed.
C. (9, 28.4) indicates that 9 ppm of chlorine was dissolved after 28.4 minutes elapsed.
D. (9, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 9 minutes elapsed.
Answer: D
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Identify whether the given scatterplot shows a positive association, negative association, or no association.The following scatterplot shows the temperature of a city and the city's latitude. 
Temperature (°F)
A. negative association B. no association C. positive association
Solve.
(x + 9) > 
(x + 2)
A. x < 
B. x < - 
C. x > - 
D. x > 
For the pair of functions, find the indicated sum, difference, product, or quotient.f(x) = 8x + 1, g(x) = 4x - 2Find (fg)(x).
A. 32x2 - 12x - 2 B. 32x2 - 2 C. 12x2 - 12x - 1 D. 32x2 + 2x - 2
Convert the improper fraction to a mixed number. Write the answer in lowest terms.
A. 3
B. 2
C. 3
D. 4