Solve the problem.Susan has been working on a job that will require 45 hours to complete. If she has completed  of the job, how many hours has she worked?

A. 40 hours
B. 20 hours
C. 5 hours
D. 4 hours

Answer: A

Mathematics

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Evaluate the integral by changing the order of integration in an appropriate way.

A. 1 ln 126
B.  ln 126
C.  ln 626
D. 1 ln 626

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Determine whether the argument is valid or invalid.Sam plays tennis or George is not a man. If George is not a man, then Betsy does not win the award. Betsy wins the award. Therefore, Sam does not play tennis.

A. Valid B. Invalid

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Evaluate the integral.

A. e-x7 + C
B. -7e-x8 + C
C. - e-x7 + C
D. - e-x8 + C

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Find the exact values of s in the given interval that satisfy the given condition.[-2?, ?); cos2 s = 

A. - , - , 
B. - , - , - , - , , 
C. - , - , 
D. - , - , - , - , , 

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