Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.(-5)-2
A. -25
B. 
C. 25
D. - 
Answer: B
Mathematics
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Write the continued fraction in the form 
reduced to lowest terms.1 + 
A. 
B. 
C. 
D. 
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Evaluate the definite integral.
?
?
A. 
B. 
C. 
D. 
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Simplify the expression. All exponents should be positive integers.(x-4y6)-4
A. 
B. 
C. 
D. 
Mathematics
Use the information in the table to solve the problem. Write your answer as a fraction in lowest terms.The table below shows the amounts of pollutants (in parts per million) in a sample of rainwater.
Find the ratio of pollutant A to pollutant B.
A. 
B. 
C. 
D. 
Mathematics