Find the volume and surface area of the figure. Use 3.14 as the approximate value of ?. Round your answer to the nearest tenth, if necessary.
A. V = 1256 in.3 SA = 541.7 in.2
B. V = 125.6 in.3 SA = 659.4 in.2
C. V = 251.2 in.3 SA = 145.2 in.2
D. V = 314 in.3 SA = 290.5 in.2
Answer: D
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A. 
B. 
C. 
D. 
Solve.The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. The helicopter flies for 2 hours and uses 14 gallons of fuel. Find the number of gallons of fuel that the helicopter uses to fly for 5 hours.
A. 40 gallons B. 35 gallons C. 10 gallons D. 42 gallons
Write the expression in terms of sine and cosine, and simplify so that no quotients appear in the final expression.(1 + cot ?)(1 - cot ?) - csc2 ?
A. 0 B. -2 cot2 ? C. 2 cot2 ? D. 2
Use the square root property to solve the equation.(x + 9)2 = 20
A. -2
, 2
B. 2
- 9, 2
+ 9
C. -9 - 2
, -9 + 2
D. -9 - 2
, -9 + 2