Simplify the expression involving rational exponents.
-1/2
A. 
B. Not a real number
C. 
D. 
Answer: C
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Express the given logarithm as a sum and/or difference of logarithms. Simplify, if possible. Assume that all variables represent positive real numbers.log5
A. 
log5r + 
log5s - 
log59
B. 
log5rs - 
log59
C. 
log5r ? 
log5s ÷ 
log59
D. 
log5r + 
log5s - log59
Determine if the matrix is in row-echelon form.
A. Yes B. No
Evaluate.35
A. 729 B. 15 C. 125 D. 243
An executive of Trident Communications recently traveled to London, Paris, and Rome. He paid $170, $230, and $150/night for lodging in London, Paris, and Rome, respectively, and his hotel bills totaled $4,240. He spent $110, $130, and $100/day for his meals in London, Paris, and Rome, respectively, and his expenses for meals totaled $2,670. If he spent as many days in London as he did in Paris and Rome combined, how many days did he stay in each city?
a. 14 days in London, 5 days in Paris, 9 days in Rome b. 12 days in London, 5 days in Paris, 7 days in Rome c. 16 days in London, 7 days in Paris, 9 days in Rome d. 7 days in London, 5 days in Paris, 12 days in Rome e. 14 days in London, 7 days in Paris, 7 days in Rome