Respuesta :

Answer:

see the explanation below

Step-by-step explanation:

Given data

Note: the Specification of the window is not given

Say the Area of the window is x square foot

Then the cost to install the window at a rate of  $70 per square foot

will be

=70*x

By the time you substitute the area of the window into the expression above, you will get the cost to install the windoew