Simplify.2 - 7(-9)
A. 61
B. -45
C. 65
D. -61
Answer: C
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Solve the problem.The graph shows the average cost of a barrel of crude oil for the years 1981 to 1990 in constant 1996 dollars. Find the approximate average change in price from 1981 to 1986.1996 $/Barrel 
Year
A. About -$9/year B. About -$4/year C. About -$37/year D. About -$15/year
First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Julian is taking a road to Calistoga. He has already driven 76.19 kilometers. If the entire distance to Calistoga is 132 kilometers, how much further must Julian drive?
A. Estimate: 20 kilometers; exact: 55.91 kilometers B. Estimate: 30 kilometers; exact: 56.81 kilometers C. Estimate: 30 kilometers; exact: 65.81 kilometers D. Estimate: 20 kilometers; exact: 55.81 kilometers
Find the one-sided limit.
sin x
A. 0
B. 1
C. 
D. 
Solve the problem.The value, in dollars, of a copy machine is given by the function 
where x is the number of years that have passed since the machine was purchased. Interpret the slope of the graph of f as a rate of change.
A. The copy machine decreases in value by $185 each year. B. The copy machine decreases in value by $370 each year. C. The copy machine increases in value by $185 each year. D. The copy machine increases in value by $370 each year.