Find the product. Write the answer in standard form.6i(9 - 6i)
A. 54i + 36i2
B. 54i - 36
C. - 54i - 36i2
D. 36 + 54i
Answer: D
Mathematics
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Evaluate the improper integral.
A. 
B. 
C. 
D. 
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Write the expression in terms of sines and/or cosines, and then simplify.sec ?(cot ? + tan ?)
A. 
B. 
C. cos ? - sin ?
D. 
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Find the derivative of the function.y = (x + 1)2(x2 + 1)-3
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.During one year, the Cheung's real estate bill included $285 for county services. Of this amount, $52 went to the highway department. What percent did the county highway department receive? (Round answer to two decimal places.)
A. 17.89% B. 81.75% C. 18.25% D. 1482.00%
Mathematics