Find the volume of the indicated region.the region that lies under the plane 
and over the triangle with vertices at 
, 
, and 
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.The voltage E in an electrical circuit is given by E = 7.1 cos 80?t, where t is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second).
A. 80
B. 
C. 40
D. 
Solve the rational inequality and graph the solution set on a real number line. Express the solution set in interval notation.
? 2
A. (-3, 6]
B. [-6, -3)
C. (-?, -3) or [0, ?)
D. (-?, -6] or (-3, ?)
The grade of a highway up a hill is 44%. How much change in horizontal distance is there if the vertical height of the hill is 450 feet? Express the answer to the nearest foot.
A. 1,042 ft B. 1,023 ft C. 923 ft D. 1,033 ft E. 998 ft
Use Euler's method to approximate the indicated function value to three decimal places using 
- y = 3ex; y(0) = 80; find y(0.4)
A. 119.140 B. 120.018 C. 119.718 D. 118.736