Find the indicated matrix.Let A = 
and B = 
. Find AB.
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.The speed of a stream is 4 mph. If a boat travels 88 miles downstream in the same time that it takes to travel 44 miles upstream, what is the speed of the boat in still water?
A. 14 mph B. 8 mph C. 12 mph D. 15 mph
Find an exponential model for the following data set. Round your answer to two decimal places. t 0 2 4 6 y 3.03 3.67 4.44 5.37?
A. 
B. ?
C. ?
D. ?
Find the unit vectors that are parallel to the tangent line to the curve y=2x at the point (4,16).
What will be an ideal response?
Provide an appropriate response.The cost C of processing exhaust gases so that you remove all but x percent of the pollutants is given by 
Find the values of x for which C < 0. Discuss the meaning of the results.
What will be an ideal response?