Currently, a discount appliance store is selling 200 large-screen TVs each month. If the store invests x thousands of dollars in an advertising campaign, the ad company estimates that monthly sales can be determined by the formula: N(x) = 3x° – 0.25x + 200 when 0< x < 9. How many dollars should the appliance store spend in advertising in order to maximize the rate of change in sales?

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A:

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A:

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A: NOTE: Refresh your page if you can't see any equations. . the revenue and cost functions are

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A: Given: The slope of the function is, dfdx=2x2+4x

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Q: Find a 4th degree function that has solutions X=-4-2/3 and x=-4+2/3, x=2i and x=-2

A: See the attachment

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A: (a)

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A: Find a quadratic function f whose graph matches the one given.

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.