Stanley had $10.75 he bought a notebook for $1.89 and a package of pens for $3.72 he will use the rest of his money to buy as many folders as he can if each folder cost $0.64 how many folders can stanley buy

29 is the correct answer

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