In this scenario, Annabel is concerned with the growth of fruit flies over a period of time leading up to when she bakes the banana bread. The function \( f(t) = 8(2)^t \) models the number of fruit flies after \( t \) days, with \( t \) representing the number of days since she returned from the market.
Since Annabel bakes the banana bread 5 days after returning from the market, the value of \( t \) should reflect this time frame. An appropriate domain for the variable \( t \) in this context would be from the moment she brings the bananas home (day 0) until the day she bakes the banana bread (day 5).
Thus, the appropriate domain is:
\[ 0 \leq t \leq 5 \]
So the correct response is:
0 ≤ t ≤ 5