Josh is an aspiring musician. He has a music contract that pays him a base rate of $200 a month and an additional for each song on itunes that he sells. Last month he earned a total of $644 dollars.

answer: hey there,

the answer you are looking for is a..

hope this you!

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

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734