Mrs. Benton treats herself to a day at Nail Spa. The services she receives are a manicure for $25 and a pedicure for $30. She al
2 answers:
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Answer:
Step-by-step explanation:
Calculate the derivative of the function:
Calculate the zeros of the derivative:
Let's check the derivative sign:
Sketch a parabola open down
(before the brackets there is the number -3 < 0)
Look at the picture.
Where the derivative is negative, the function decreases.
Where the derivative is positive, the function increases.
Therefore your answer is:
