Use the given transformation to evaluate the integral.   Rwhere R is the parallelogram bounded by the lines    

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A. 4
B. 8
C. -4
D. -8

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Answer: A

Mathematics

Find the volume of the indicated region.The region bounded by the coordinate planes, the parabolic cylinder , and the plane 

A. 4500 B. 2250 C. 2000 D. 6000

Find the indicated angle.Find the complement of 87°.

A. 3° B. 273° C. 93° D. 183°

Find the angle between the given vectors to the nearest tenth of a degree.a = 5i + 4j,  b = -9i + 4j

A. 165.3° B. 125.9° C. 117.4° D. 118.4°

Factor, if possible.9x2 - 6xt - 8t2

A. (3x - 4t)(3x - 2t) B. Prime polynomial C. (3x - 4t)(3x + 2t) D. (3x + 4t)(3x - 2t)