Samuel has a toy car collection of 200 toy cars. He keeps some in a display case and the rest on the wall. He keeps 41% of his toy cars in the display case. How many toy cars does he keep on his wall?

82

Step-by-step explanation:

because 41 percent of 200 is 82

118

Step-by-step explanation:

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