James is going on vacation for 9 days. William is going on vacation for 6 times as long. How long is William going on vacation? Group of answer choices:

William is going on vacation for 36 days.

William is going on vacation for 45 days.

William is going on vacation for 54 days.

William is going on vacation for 63 days.

William is going on vacation for 54 days

Step-by-step explanation:

C) William is going on vacation for 54 days

Step-by-step explanation:

We know that James is going on vacation for 9 days. We also know that William goes on vacation for 6 *times* as long. What this means is that we are answering 9 times 6, which is 54

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