Factor.16x4y + 28x3y - 36xy
A. 4xy(x3 + x2 - 9)
B. 4x3 + 7x2 - 9
C. 4xy(4x3 + 7x2 - 9)
D. 4x3y(4 + 7x2 - 9x)
Answer: C
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Find the derivative of the given function.y = 1.2 cos-1 3t
A. - 
B. 
C. 
D. - 
Find (a) the gross profit, (b) the net income before taxes, and (c) the net income after taxes.Steel Master Sales had a cost of goods sold of 
operating expenses of 
returns of 
taxes of 
and gross sales of 
A. (a) $381,000 (b) $121,000 (c)$94,100 B. (a) $365,000 (b) $121,000 (c)$94,100 C. (a) $294,000 (b) $121,000 (c)$94,100 D. (a) $278,000 (b) $121,000 (c)$94,100
Solve the problem.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). The linear model for this data is 
where x is the cost of advertising (in thousands of dollars) and y is number of products sold (in thousands). Use this model to predict the number of products sold (in thousands) if the cost of advertising is $8000. 
A. 22,375,800 products sold B. 84,820 products sold C. 78,120 products sold D. 75,120 products sold
Use a graphing calculator to estimate the solution set of the equation. Round to the nearest hundredth.52x = 2x + 1
A. {0.27} B. {0.43} C. {1.43} D. {0.76}