Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 4p2
C. 
D. 
Answer: C
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Solve.The speed of a stream is 4 mph. If a boat travels 78 miles downstream in the same time that it takes to travel 39 miles upstream, what is the speed of the boat in still water?
A. 15 mph B. 12 mph C. 8 mph D. 14 mph
If one of student is selected at random what is the probability that he or she spent between 10 and 20 hours in the lab?
Use the following information to answer question, 24 students in an engineering class were asked to record the number of hours spent in a lab during a week. The results are listed below. 3, 10, 21, 14, 8, 5, 1, 4, 13, 7, 9, 6, 11, 10, 6, 7, 12, 16, 1 , 7, 14, 1, 11, 8
Provide an appropriate response.True or false? If a < 0 and b < 0, then 
? 
= 
.
A. True B. False
Solve the linear inequality. Graph the solution set on a number line, and express the solution using interval notation.5x - 2 > 4x - 7
A. (-9, ?)
B. (-?, -5]
C. (-5, ?)
D. [-5, ?)