Concept explainers
Find the levels between the daily sales vary.

Answer to Problem 97E
The solution set is all real numbers that are greater than or equal to 82 and less than and equal to 246 which is denoted by [82,246]
Explanation of Solution
Given:
Consider a doughnut shop sells a dozen doughnuts for $7.95. Beyond the fixed costs of $165 per day, it costs $1.45 for enough materials and labor to produce a dozen doughnuts. The daily profit from doughnutsales varies between $400 and $1200.
The daily profit from doughnut sales varies between$400 and $1200.
Doughnut shop sells a dozen doughnuts for $7.95.
So,
The solution set is all real numbers that are greater than or equal to 82 and less than and equal to 246 which is denoted by [82,246]
Chapter A Solutions
EBK PRECALCULUS W/LIMITS
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