Find the common ratio.75, 60, 48, 38.4, 30.72, . . .
A. -0.8
B. 1.25
C. 0.8
D. 30.72
Answer: C
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Solve the problem.The period of vibration P for a pendulum varies directly as the square root of the length L. If the period of vibration is 3 sec when the length is 36 inches, what is the period when 
(Round to the nearest hundredth.)
A. 0.75 sec B. 3.25 sec C. 3.75 sec D. 4.00 sec
Compute r, the linear coefficient of correlation, for the given data.
A. 0 B. 0.005 C. -0.006 D. 0.006
Identify a, b, and c from the quadratic equation.
A) a=5, b=-7, c=4
B) a=4, b=5, c=7
C) a=5, b=7, c=4
D) a=0, b=4, c=7
E) a=-7, b=-4, c=0
Solve.The weight of an object on Earth and the weight of the same object on Planet X are proportional. A dog that weighs 20 pounds on Earth would weigh 70 pounds on Planet X. If a person weighs 160 pounds on Earth, what would he weigh on Planet X? (Round to the nearest whole number, if necessary.)
A. 46 pounds B. 2240 pounds C. 560 pounds D. 11 pounds