11) The total cost after tax to repair Deborah's computer is represented by
.04(50h) + 50h, where h represents the
number of hours it takes to repair
Deborah's computer. What part of the
expression represents the amount of tax
Deborah has to pay? Explain.
How much is the store charging per hour
to work on the computer?

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

step-by-step explanation:

well the answer to that is xoxoxo

step-by-step explanation: