Solve the problem.An auxiliary fuel tank for a helicopter is shaped like the surface generated by revolving the curve 
- 2 ? x ? 2, 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. 50
B. 38
C. 75
D. 150
Answer: D
Mathematics
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Solve.A parking area that is to be resurfaced is shaped like a trapezoid. The bases are 100 feet and 110 feet, and the height is 30 feet. What is the cost if the price of the resurfacing is $1.10 per square foot?
A. $3465.00 B. $6930.00 C. $12,100.00 D. $3150.00
Mathematics
Complete the table for the equation.y + 3x = 19
A. 
B. 
C. 
D. 
Mathematics
Solve.Find the total area of all four vertical sides of the building.
A. 1586 ft2 B. 1561 ft2 C. 3460 ft2 D. 3122 ft2
Mathematics
Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
A. 
B. 
C. - 
D. 
Mathematics