Solve the question below

answer is $198

Step-by-step explanation:

$180 × .10 = $18

$180 + $18 =$198

198.00

Step-by-step explanation:

■ Sales tax: $18.00

■ Cost/Price before ST: $180.00

■ Total Cost/Price including ST: $198.00

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