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). How many cubic feet of fuel will the tank hold to the nearest cubic foot?
A. 8
B. 17
C. 21
D. 5
Answer: B
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Write the complex number in trigonometric form r(cos ? + i sin ?), with ? in the interval [0°, 360°).9
+ 9i
A. 18(cos 30° + i sin 30°) B. 18(cos 60° + i sin 60°) C. 18(cos 330° + i sin 330°) D. 18(cos 300° + i sin 300°)
Solve the problem.You have 260 feet of fencing to enclose a rectangular region. Find the dimensions of the rectangle that maximize the enclosed area.
A. 67 ft by 63 ft B. 130 ft by 32.5 ft C. 130 ft by 130 ft D. 65 ft by 65 ft
Solve the problem.The population of cows C in a midwestern county during year x can be represented by 
where x is any year between 1 and 10 since the county started recording this information. Find the year when there were 42,900 cows algebraically by solving the equation 42,900 = 1700x + 31,000.
A. year 10 B. year 9 C. year 8 D. year 7
Sketch the graph on the coordinate system provided.y = -sin 8x
A. 
B. 
C. 
D. 