Cooper needs to travel by bus for 21 days in June. A daily ticket will cost him $5.80 and a monthly ticket will cost him $109.20. What is his average daily saving if Cooper buys a monthly ticket? pls do full solution, thanks!!​

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

its a, i had the same answer, its from study island right

step-by-step explanation: