Chapter 5.2, Problem 21E

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Consider the following function and graph. y = |x² - 161 y 20 15 VV 10 5 -6 -4 -2 Explain your reasoning. 2 4 Describe the x-values at which the function is differentiable. (Enter your answer using interval notation.)

Sales v (in thousands of dollars) decreased steadily then increased steadily, as shown in the graph where x is the time in months. This can be modeled by f(x)= 2x– 3 +1 for x>0. y (0, 7) 7. 1 (3, 1) 012 3 4 5 6 * Time (months) 98. Which piecewise definition should be used to find the sales in month 2? A) -2x+4 if x3 D) 2.x-2 if x23 99. Which piecewise definition should be used to find the sales in month 5? A) -2x+4 if x<3 B) -2x+7 if r<3 C) 2.x-5 if x23 D) 2x-2 if x23 100. What are the sales during month 6? A) $3000 B) $6000 C) $7000 D) $10000 Sales (thousands of dollars)

Question Of Evaluate of the function f (x, y) = x³ + y²x - 3. Write the expression in terms of x and y. Provide your answer below: