Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.
A. 12
B. 1
C. 
D. 
Answer: D
Mathematics
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Find the limit.
A. Does not exist B. -? C. ? D. 1/2
Mathematics
Estimate the answer by using front end rounding.
A. 61 B. 150 C. 50 D. 100
Mathematics
Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 80 ft/sec, and the gorge is 96 ft deep, during what interval can the flare be seen? 
A. 2 < t < 3 B. 4 < t < 5 C. 6 < t < 7 D. 0 < t < 2
Mathematics
Add or subtract as indicated. Write the answer in lowest terms.
- 
A. 
B. 
C. 
D. 
Mathematics