Simplify the expression.(-39)4
A. Exponent: -39, base: 4
B. Exponent: 4, base: -39
C. Exponent: -4, base: 39
D. Exponent: 4, base: 39
Answer: B
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Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 0.05 B. 0.5 C. 3 D. 0.1
Match the vector equation with the correct graph.
r(t) = 
ti +(2 - t)k; 0 ? t ? 2
A. Figure 3 B. Figure 1 C. Figure 5 D. Figure 8
Find the modulus of the number.-6
A. -36 B. -6 C. 6 D. 36
Solve the problem. A reasonable quadratic model for the population of a certain city is found to be 
where P(t) is the population (in thousands) of the city in the year that is t years since 2012. A reasonable quadratic model for the consumption of bottled water in the city is 
, where B(t) is the total amount of bottled water (in thousands of gallons) consumed by the residents of the city in the year that is t years since 2012. Let M(t) be the annual mean consumption of bottled water per person in the year that is t years since 2012. If M(t) is obtained by
finding the ratio 
, what are the units of M?
A. people per gallon
B. gallons per thousand people
C. gallons per person
D. thousands of gallons per person