Solve the problem.Suppose that the function y = f(x) is decreasing on the interval (9, 6). What can be said about the graph of 
A. increasing on (-9, -6)
B. decreasing on (9, 6)
C. decreasing on (-9, -6)
D. increasing on (9, 6)
Answer: D
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Use sets to solve the problem.A survey of a group of 117 tourists was taken in St. Louis. The survey showed the following:66 of the tourists plan to visit Gateway Arch;49 plan to visit the zoo;11 plan to visit the Art Museum and the zoo, but not the Gateway Arch;14 plan to visit the Art Museum and the Gateway Arch, but not the zoo;19 plan to visit the Gateway Arch and the zoo, but not the Art Museum;7 plan to visit the Art Museum, the zoo and the Gateway Arch;16 plan to visit none of the three places.How many plan to visit the Art Museum only?
A. 101 B. 37 C. 12 D. 49
Find the gross earnings.Gross sales: $5148Sales returns: $494Net quota: $1007Commission rate: 9%
A. $418.86 B. $328.23 C. $372.69 D. $329.13
Find the distance between the points.(5, 5), (-2, -5)
A. 
B. 51
C. -3
D. 70
Solve the problem.A parallelogram has a base of length x + 7 and a height of x + 2 and has an area of 50 square units. Find the base and height of the parallelogram. (A = BH)
A. height = 2 units; base = 25 units B. height = 1 unit; base = 50 units C. height = 6.25 units; base = 8 units D. height = 5 units; base = 10 units