Use the Laws of Exponents to simplify. Write the answer with positive exponents. All variables are nonzero. 
A. - 
B. 
C. 
D. - 
Answer: B
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Convert to percent.0.9
A. 90% B. 0.09% C. 900% D. 0.9%
Solve.If y varies inversely as x, and y = 5 when x = 56, find y when x = 8.
A. 35
B. 
C. 
D. 
Use a graphing utility to find the sum of the geometric sequence. Round answer to two decimal places, if necessary.
A. 1,230 B. 87 C. 726 D. 24
Solve the problem.Sue wants to put a rectangular garden on her property using 78 meters of fencing. There is a river that runs through her property so she decides to increase the size of the garden by using the river as one side of the rectangle. (Fencing is then needed only on the other three sides.) Let x represent the length of the side of the rectangle along the river. Express the garden's area as a function of x.
A. A(x) = 39x2 - x
B. A(x) = 39x - 
x2
C. A(x) = 38x - 
x2
D. A(x) = 40x - 2x2