Simplify and write with only positive exponents.4a-3b-5c6
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.The population size of a culture of bacteria triples every day such that its size is modeled by the sequence 
where n is the number of the day just beginning. Find the size of the culture at the beginning of the third day and the size of the culture originally.
A. 720 bacteria; 26
bacteria originally
B. 2160 bacteria; 240 bacteria originally
C. 2160 bacteria; 80 bacteria originally
D. 720 bacteria; 80 bacteria originally
Find the sum or difference. Express the answer reduced to lowest terms and use the denominator given in the first rational expression.
- 
A. 
B. 
C. 
D. 2
Simplify the radical expression. Assume all variables represent nonnegative real numbers.
A. t4
B. t7
C. t3
D. t14
Simplify. 
A. 
y
B. 
C. 
D. 