Provide an appropriate response.The rafters of a house make a 30° angle with the joists. If the rafters have a 20-in. overhang and the center of the roof is 12 ft above the joists, how long must the rafters be cut? 
A. 25 ft 8 in.
B. 21 ft 8 in.
C. 24 ft 8 in.
D. 26 ft
Answer: A
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Find the missing value and write a conclusion.39% of what number is 78?
A. 39% of 0.5 is 78. B. 39% of 50 is 78. C. 39% of 2000 is 78. D. 39% of 200 is 78.
Solve the problem. Round your answer, if appropriate.The following table shows the rate of water flow (in gal/min) from a stream into a pond during a 30-minute period after a thunderstorm. Use the trapezoidal rule to estimate the total amount of water flowing into the pond during this period.
A. 9600 gallons B. 7716.7 gallons C. 8475 gallons D. 8483.3 gallons
Solve and check your solutions.
x = 0
A. x = 1 B. x = -7 C. x = 7 D. x = 0
Use the given values to evaluate (if possible) three trigonometric functions cos x, csc x, tan x.
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A. ?
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B. ?
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C. ?
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D. ?
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E. ?
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