Solve.A cyclist biked uphill 3 mi at a speed r mph and then returned (downhill) at three times the speed. How long did the whole trip take? Write the answer as a single rational expression.
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Answer: D
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For the given function, find the rate of change.y = 700 - 6x
A. 5 B. 700 C. -6 D. 6
Solve.The sum of the areas of two square plots of land is 2122 m2 and the difference of their areas is 1240 m2. Find a length of a side of each plot.
A. 22 m, 62 m B. 40 m ,20 m C. 5.25 m, 41 m D. 41 m, 21 m
Approximate the area of the circle using 3.14 for ?.
A. 50.24 ft.2 B. 24.12 ft.2 C. 12.56 ft.2 D. 25.12 ft.2
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