Monkey chunks cereal is normally $3.25 per box but today it's on sale for 25% off. what is the new price? round to the nearest penny?
a. $3.50
b. $2.44
c. $0.81
d. $0.06

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

2/3

step-by-step explanation: