Solve the problem.An auxiliary fuel tank for a helicopter is shaped like the surface generated by revolving the curve 
, - 5 ? x ? 5, about the x-axis (dimensions are in feet). If a cubic foot holds 7.481 gallons and the helicopter gets 3 miles to the gallon, how many additional miles will the helicopter be able to fly once the tank is installed (to the nearest mile)?
A. 125
B. 94
C. 188
D. 376
Answer: D
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Add and, if possible, simplify.-1 + 
+ 
A. -4
B. 
C. - 
D. - 
Solve the problem.Parts for an automobile repair cost $324. The mechanic charges $27 per hour. If you receive an estimate for at least $378 and at most $459 for fixing the car, what is the time interval that the mechanic will be working on the job?
A. 1 ? t ? 5 B. 1 ? t ? 2 C. 14 ? t ? 17 D. 2 ? t ? 5
Provide an appropriate response.What are four ways that a function may fail to be differentiable at a point?
A. The function is not defined at the point; the function is discontinuous at the point; the function has a limit at the point; the function has a vertical tangent at the point. B. The function is not defined at the point; the function is discontinuous at the point; the function has a corner or similar sharp change in direction at the point; the function has a vertical tangent at the point. C. The function is not defined at the point; the function is discontinuous at the point; the function has a corner or similar sharp change in direction at the point; the function has a horizontal tangent at the point. D. The function is not defined at the point; the function is discontinuous at the point; the function has a peak or a valley at the point; the function has a vertical tangent at the point.
Given 
, find 
.
?
A. 4 B. 22 C. 16 D. 19 E. -4