Cassie is measuring the dimensions of her bedroom wall so that she will know how much paint to buy. which of the choices shown is a reasonable measurement for a wall in her bedroom?
a) 10 feet by 22 feet
b) 10 yards by 22 yards
c) 10 inches by 22 inches
d) 10 meters by 22 meters

A) 10 feet by 22 feet

Step-by-step explanation:

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