Final answer:
A function that represents a pond with 150 fish decreasing by 8% each day is given by the exponential decay formula P(t) = 150 × (1 - 0.08)^t.
Step-by-step explanation:
If a pond had 150 fish, and the population decreases by 8% each day, we can write a function to represent this situation by using exponential decay. The formula for exponential decay is P(t) = P0 × (1 - r)t, where P(t) represents the population at time t, P0 is the initial population, r is the rate of decrease, and t is the time in days. In this scenario, P0 = 150 fish, and r = 0.08 (8% as a decimal). Thus, the function for this situation is P(t) = 150 × (1 - 0.08)t.