Answer:

Step-by-step explanation:
So, for 60 square feet they charge = 287
So, for 1 square foot they charge = 
If they charge the installation fee this becomes = 
We can write an equation to calculate cost by using this 
Where x is the amount of square foot
Answer:
10 6/10
Step-by-step explanation:
8/6 = 1.333
1.333 x 8 = 10.667
as a mixed number: 10 6/10
Answer:
14
20
18
24
Step-by-step explanation:
36 = 6 x 6
16 = 4 x 4
25 = 5 x 5
All others are not square
It was about 17.4%
======================================================================
% error=
actual value-estimated value
Then divide that by actual value