ANSWER ASAP Which of the following situations could be described by the equation y = 120 – 25x?

A) There are 120 people in the football stadium, and 25 more are entering each hour.
B) A plumber charges $25 for a house call and $120 per hour.
C) A teacher has 120 students. Her third period has 25 students.
D) There are 120 gallons of water in a tank. It releases water at a rate of 25 gallons per minute.

HELP ME FIND THE SURFACE AREA OF THE POLYGON

Step-by-step explanation:

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