Answer:
cm is a abbreviation for centimeters. So cm^2 means that there is a unknown value that is being squared or multiplied by itself.
7.50cm^2=56.25cm
7.50cm^2 basically means that 7.50 is being multiplied by itself, so, 7.50×7.50=56.25. Then you would put cm at the end of it because it shows that it's a form of measurement. (centimeters)
Explanation: