Final answer:
The function f(t) = 3000 * (1/4)^t models the change between the number of days and the number of orders remaining.
Step-by-step explanation:
The function that models the change between the number of days, t, and the number of orders remaining, f(t), can be represented as:
f(t) = 3000 * (1/4)t
This function represents exponential decay, where the number of orders remaining decreases by one-fourth each day. The exponent t represents the number of days, and the initial number of orders is 3000.