Simplify. Assume that all variables represent positive numbers.
A. 7.5x5z6
B. 15x8z11
C. 15x5z6
D. 7.5x5yz6
Answer: C
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Determine the domain and range of the function. Then graph it.f(x) = 
A. domain = [2, ?), range =[0, ?)
B. domain = [0, ?), range = [-2, ?)
C. domain = (-?, ?), range = [2, -2]
D. domain = (-?, ?), range = (-?, ?)
Solve the problem.By switching service providers, a family's telephone bill decreased from about $50 a month to about $46. What was the percent of decrease? Round to the nearest tenth if necessary.
A. 9%
B. 8%
C.
| 4% |
D. 8.7%
Use properties of rational exponents to simplify the expression. Assume that any variables represent positive numbers.
A. 25x5/6 B. 25x3 C. 5x5/6 D. 5x2/3
is tangent to 
at point B. If the length of radius of 
is r, AC = 1, and AB = 3, write an equation that involves r.
What will be an ideal response?