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(find the attachment below for the answer) :)
Answer:
$1,875
Step-by-step explanation:
(if 500 is 80%, divide 1500 by 4 to get 20%)
1500 divided by 4 is 375
375 plus 1500 is 1875
The function is graphed as shown below
Part A:
We use the formula

to find the vertex of the function. A quadratic function of the form of

and equating this form to the given function

, we have

and

.
Substituting

and

into the vertex formula, we have

, as shown in the graph
This calculation means that the highest profit is achieved when the number of photo printed equals to ten photos
Part B:
We can find solution to this equation by factorising





and

, as shown in the graph
The two values means that the company makes no profit when they either produce 5 or 15 photos