Solve the problem.A trough is to be made with an end of the dimensions shown. The length of the trough is to be 
long. Only the angle ? can be varied. What value of ? will maximize the trough's volume?
A. 8°
B. 30°
C. 52°
D. 32°
Answer: B
Mathematics
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 Figure 3.png)
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Subtract the integers.25 - (-43)
A. 59 B. 86 C. 68 D. 77
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Find the vertex.f(x) = (x + 4)2 + 4
A. (0, 4) B. (4, 0) C. (-4, -4) D. (-4, 4)
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Find the exact value of the indicated trigonometric function of ?.sin ? = - 
, tan ? > 0Find sec ?.
A. - 
B. - 
C. - 
D. 
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