Write in exponential form.log28 = 3
A. 83 = 2
B. 28 = 3
C. 32 = 8
D. 23 = 8
Answer: D
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Rationalize the denominator.
A. 
B. 21
C.
 ? |
D.
Determine which values of x and y, if any, are not permissible. f(x, y) = 
A. Points satisfying x2 + y2 ? 36 are not allowed. B. The points (0, 6) and (6, 0) are not allowed. C. Points satisfying x2 + y2 > 36 are not allowed. D. All values of x and y are permissible.
Identify the numerator and the denominator of the fraction.
A.
| numerator: | 9 |
| denominator: | 1 |
B.
| numerator: | 4 |
| denominator: | 5 |
C.
| numerator: | 5 |
| denominator: | 4 |
D.
| numerator: |  |
| denominator: | 5 |
Solve the problem.The price P of a certain computer system decreases immediately after its introduction and then increases. If the price P is estimated by the formula 
where t is the time in months from its introduction, find the time until the minimum price is reached. Round to the nearest tenth if necessary.
A. 11 months B. 25.9 months C. 6.5 months D. 12.9 months