If a customer perceives that an established firm's products meet his/her needs in a unique way, the firm has succeeded in establishing
A. economies of scale
B. differentiation
C. switching costs
D. capital requirements
Answer: B
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Classify the system as independent, inconsistent, or dependent.x + y = 2x + y = 5
A. Dependent B. Inconsistent C. Independent
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 function is obtained: 
where x is the cost of advertising (in thousands of dollars) and y is number of products sold (in thousands). Use this function to predict the number of products sold if the cost of advertising is $7000. Round to the nearest hundredth.
A. 82.03 B. 72.33 C. 19,585.8 D. 75.33
Find the inverse, if it exists, for the matrix.
A. 
B. 
C. 
D. 
Simplify the polynomial by combining like terms: - 7r + 6t - s - 5r + 12s + 4t - t + 5s - r.
a.13r + 16s + 9t b. -13r -16s + 9t c. -13r + 16s + 9t d. -13r -16s -9t