Simon has a certain length of fencing to enclose a rectangular area. the function a models the rectangle's area (in square meters) as a function of its width (in meters).

The maximum area is 1,600 square meters

Step-by-step explanation:

The complete question is

What is the maximum area possible?

The given function area is modeled by A(w)=-w(w-80)

we know that

The given function is a vertical parabola open downward

The vertex is a maximum

The x-coordinate of the vertex represent the width for the maximum area

The y-coordinate of the vertex represent the maximum area

Convert the quadratic function in vertex form

Factor -1

Complete the square

Rewrite as perfect squares

----> function in vertex form

The vertex is the point (40,1,600)

therefore

The maximum area is 1,600 square meters

you already gave the answer

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.