Solve.An experienced accountant can prepare a tax return in 12 hours. A novice accountant can do the job in 19 hours. How long will it take them to do the job working together?
A. 32
hr
B. 
hr
C. 
hr
D. 7
hr
Answer: D
Mathematics
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Simplify the expression. Write the result using positive exponents only.(3x2)3(2x)-1
A. 
B. 
C. 
D. 6x5
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Evaluate the improper integral.
A. 
B. 
C. 
D. 
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Determine if the given function y = f(x) is a solution of the accompanying differential equation.y' + y = e2xy = 2e- x + e2x
A. Yes B. No
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Perform the indicated operation.
A. -2n6 + 7n3 + 25 B. -2n6 + 7n3 + 13 C. -2n6 + 8n3 + 13 D. 30n9
Mathematics