List the intercepts of the graph. 
A. (-7, 0), (0, -7), (0, 7), (7, 0)
B. (0, 7), (7, 0)
C. (-7, 0), (0, 7)
D. (-7, 0), (0, -7), (0, 0), (0, 7), (7, 0)
Answer: A
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Figure (a) shows a vacant lot with a 80-ft frontage in a development. To estimate its area, we introduce a coordinate system so that the x-axis coincides with the edge of the straight road forming the lower boundary of the property, as shown in Figure (b). Then, thinking of the upper boundary of the property as the graph of a continuous function f over the interval [0, 80], we see that the problem is mathematically equivalent to that of finding the area under the graph of f on [0, 80]. To estimate the area of the lot using a Riemann sum, we divide the interval [0, 80] into four equal subintervals of length 20 ft. Then, using surveyor's equipment, we measure the distance from the midpoint of each of these subintervals to the upper boundary of the property. These measurements give the
values of f(x) at x = 10, 30, 50, and 70. What is the approximate area of the lot?
?
?
?
A. 7,860 sq ft
B. 7,980 sq ft
C. 7,910 sq ft
D. 7,890 sq ft
Simplify.
A. -20 B. -4 C. 4 D. 20
Solve the problem.The percent of people who say they plan to stay in the same job position until they retire has decreased over recent years, as shown in the table below.
Find a power function that models the data in the table using an input equal to the number of years from 2000. According to the unrounded model, in what year will only 23% of people plan to stay in the same job position until retirement?
A. 2016 B. 2015 C. 2013 D. 2011
Solve the equation.log30 (x2 - x) = 1
A. {5, 6} B. {1, 30} C. {-5, -6} D. {-5, 6}