Solve the problem.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. The linear model for this data is 
where x is number of hours studied and y is score on the test. Use this model to predict the score on the test of a student who studies 13 hours. 
A. 76.2
B. 86.2
C. 86.8
D. 81.2
Answer: D
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Write out the terms of the series.
A. x + 2x2 + 3x3 + 4x4 + 5x5 + . . . B. 1 + 2x2 + 3x3 + 4x4 + 5x5 C. x + 2x2 + 3x3 + 4x4 + 5x5 D. x + x2 + x3 + x4 + x5
Simplify. Express your answer in standard form.(3x2 - 10x + 6) - (x2 - 3x + 2) + (8x2 + 5)
A. 10x2 + 7x + 9 B. -6x2 - 13x + 13 C. 10x2 - 7x + 9 D. 10x2 - 7x + 13
The Country Workshop's total weekly profit (in dollars) realized in manufacturing and selling its rolltop desks is given by
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where x stands for the number of finished units and y denotes the number of unfinished units manufactured and sold per week. Currently, the weekly output is 130 finished and 105 unfinished units. Determine the approximate change in the total weekly profit if the sole proprietor of the Country Workshop decides to increase the number of finished units to 140 per week and decrease the number of unfinished units to 100 per week.
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A. $63.33 per week
B. $950.00 per week
C. $190.00 per week
D. $95.00 per week
E. $9,500.00 per week
Round the decimal to the given place value.0.7244, nearest hundredth
A. 0.72 B. 0.724 C. 0.73 D. 0.7244