Complete the identity. = ?

A. 2 sin ? cos ?
B. cos (2?) + sin ? cos ?
C. 4 cos2 ? - 1
D. 2 cos (2?)

Answer: C

Mathematics

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Use the given transformation to evaluate the integral.     Rwhere R is the parallelepiped bounded by the planes   

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A. 26,208
B. 13,104
C. 1456
D. 2912

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Answer the given question by setting up and solving the appropriate proportion. If necessary, round the answer to two decimal places.How many meters per second are equivalent to 81 km/h?

A. 135 m/s B. 225 m/s C. 1350 m/s D. 22.5 m/s

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Expand the quotient by partial fractions.

A.   +  
B.   +  
C.   +  
D.   -  

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Find the area of the rectangle.  5 mi

A. 28 sq mi B. 25 sq mi C. 20 sq mi D. 21 sq mi

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Mathematics