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). By using linear regression, the following equation is obtained: 
where x is the cost of advertising (in thousands of dollars) and y is number of products sold (in thousands). Use this equation to predict the number of products sold if the cost of advertising is $7000.
A. 72.33
B. 19,585.8
C. 82.03
D. 75.33
Answer: D
Mathematics
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Find the inverse of the function.f(x) = e7x
A. f-1(x) = 
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