Im not sure but I think 5 because there are 25 students so put 25 in the denominator
Set up a proportion
Put 20 over 100 because percent means something over 100
25 times 4 is 100
20 divided by 4 is 5
So the answer is 5
You only need the surface area, which means you will not use cubed (^3). But the surface area is two dimensions (length and width). SO you must use m^2.
