Which of the following pairs of variables is most likely to have a spurious correlation?
a. number of dollars earned vs. number of hours worked
b. grade earned on a test vs. amount of time spent studying
c. average life expectancy vs. number of TVs per home
d. gas mileage vs. average car speed on a trip
Ans: c
Mathematics
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Find the product.(-18)(-22)
A. 396 B. 414 C. 296 D. 3960
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Solve the problem.A plane flies 430 miles with the wind and 310 miles against the wind in the same length of time. If the speed of the wind is 24 mph, what is the speed of the plane in still air?
A. 138 mph B. 148 mph C. 153 mph D. 173 mph
Mathematics
Write the decimal as a fraction or mixed number in lowest terms.63.626
A. 63
B. 
C. 12
D. 
Mathematics
Evaluate as instructed.Use f(x) = x - 3 and g(x) = x + 3 to evaluate (fg)(-1).
A. -10 B. 1 C. -2 D. -8
Mathematics