What is the area of the patio floor shown? Mrs. Garcia wants to paint her patio floor. She needs to determine the area so she will know how much paint to buy. A) 250 ft2 5 ft B) 325 ft2 5 ft 20 ft 20 ft 15 ft 375 ft2 30 ft D 450 ft2

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