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
Answer: C
Mathematics
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Plot the point in the xy-plane. Tell in which quadrant or on what axis the point lies.(0, -3) 
A. 
y-axis
B. 
Quadrant II
C. 
x-axis
D. 
y-axis
Mathematics
Add or subtract as indicated. Simplify the result, if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Below are entries in a checkbook. Find the errors in the balance calculations and report the correct final balance for your answer.
A. $6974.93 B. $9851.83 C. $9801.83 D. $6847.45
Mathematics
Use a double integral to find the volume of the solid shown in the figure.
?
?
A. 36 B. 24 C. 144 D. 12 E. 48
Mathematics