Danny “dimes” donahue is a neighborhood’s 9-year old entrepreneur. his most recent venture is selling homemade brownies that he bakes himself. at a price of $1.75 each, he sells 100. at a price of $1.25 each, he sells 300.

1/800 is the right answer

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

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.