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. 75
B. 150
C. 50
D. 38
Answer: B
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Solve the problem.39,000 people attended a ballgame at a stadium that offers two kinds of seats: general admission and reserved. The day's receipts were $291,000. How many people paid $13.00 for reserved seats, and how many paid $4.00 for general admission?
A. Reserved: 33,750 ; general admission: 5250 B. Reserved: 24,000 ; general admission: 15,000 C. Reserved: 15,000 ; general admission: 24,000 D. Reserved: 5250 ; general admission: 33,750
Multiply the expressions.(3m + 1)2
A. 9m2 + 1 B. 3m2 + 1 C. 9m2 + 6m + 1 D. 3m2 + 6m + 1
Calculate using the rules for order of operations.
A. - 
B. 
C. - 
D. 
Solve the problem.According to Ohm's law, the electric current I, in amperes, in a circuit varies directly as the voltage V. When 13 volts are applied, the current is 4 amperes. What is the current when 24 volts are applied?
A. 78 amperes B. 41 amperes C. 3.25 amperes D. 7.38 amperes