Step-by-step explanation:
13.70 square inches of the box is empty
Yes, for every value of x, there is only one value of y. This means that y is a function of x.
33% of
4.3939 is 1.45
Convert your percentage into a decimal:

Divide both of your decimals:
Percent means parts out of 100
28%=28/100=14/50=7/25