Simplify the exponential expression. Write any negative exponents as positive exponents. Assume all variables represent positive real numbers.(x14y7)1/7
A. x2
B. x14y
C. x2y
D. x2|y|
Answer: C
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and 
Find 
.
A. -6 B. 28 C. 6 D. -28
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A. 15 L B. 10 L C. 150 L D. 100 L
Solve the problem.A brick staircase has a total of 15 steps The bottom step requires 114 bricks. Each successive step requires 5 fewer bricks than the prior one. How many bricks are required to build the staircase?
A. 1147.5 bricks B. 2370 bricks C. 1185 bricks D. 2235 bricks
Use the problem-solving strategy for applications of linear equations to solve the application problem.The speed of a stream is 4 mph. If a boat travels 
downstream in the same time that it takes to travel 
upstream, what is the speed of the boat in still water?
A. 14 mph B. 12 mph C. 8 mph D. 15 mph