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Practice Problems
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1) A manufacturer produces jars of peanut butter. The cost of producing x jars is C = f(x) dollars. f(x) = -17x2 + 12x + 19. Find the average rate of change of C with respect to x when jars is changed from x = 20 to x = 39.

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By Easy Worksheet

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By Easy Worksheet

2) The number of cells after x hours in a controlled laboratory experiment is N = f(x). What are the units of the rate of change of N with respect to x??
3) The number of people in Kansas affected by the flu over January is defined by N = f(x) where x is the day of the month. What is the meaning of a rate of change in this case?

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By Easy Worksheet

By Easy Worksheet

By Easy Worksheet

4) A loaf of bread is taken from an oven when its temperature is 191°F and placed on a table in a room where the temperature is 75°F. The temperature of the loaf over x minutes is given by H = f(x). f(x) = 9x2 -90x + 191. Find the average rate of change of H with respect to x when minutes is changed from x = 50 to x = 59.

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