Find the algebraic expression that is equal to cos (180° - ?).
?
A. 
B. -sin ?
C. sin ?
D. -cos ?
E. cos ?
Answer: D
Mathematics
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Find the area of a sector with central angle 120° in a circle with radius 12 m.
 figure 1.png)
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Solve the problem by integration.Find the moment of inertia with respect to the y-axis for the area bounded by 
the 
and 
where k is the mass per unit area.
A. 
tan-1 16
B. k ln 2
C. 
D. 
Mathematics
Convert using dimensional analysis.5.03 tons to pounds
A. 0.002515 lb. B. 10,060 lb. C. 0.02515 lb. D. 1006 lb.
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Solve the equation by the method of your choice. Simplify irrational solutions, if possible.(4x + 3)2 = 7
A. 
B. 
C. 
D. 
Mathematics