Final answer:
Additional restrictions on the values of n for c(n) = 4n to model each situation
Step-by-step explanation:
The additional restrictions needed on the values of n for the function c(n) = 4n to model each situation are as follows:
For store A, since we are measuring the number of gallons of fuel, n should be a non-negative real number. In other words, n >= 0.
For store B, since we are counting the number of containers of fuel, n should be a non-negative integer. In other words, n >= 0 and n should be a whole number.