Arectangular box with an open top has a length of x feet, a width of y feet, and a height of z feet. it costs $4.20 per square foot to build the base and $0.75 per square foot to build the sides. write the cost c ofconstructing the box as a function of x, y, and z

To solve this problem you must apply the proccedure shown below:

1. You have that:

-The length is feet.

- The width is feet.

- The height is feet.

2. The box has one base. The cost of the base is:

3. It has four sides. The cost of the sides are:

The answer is: The total cost is

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value