Final answer:
The equation that represents the amount of water in the basin after n seconds is y = 5000 + 300n.
Step-by-step explanation:
The equation that represents the amount of water in the basin after n seconds is y = 5000 + 300n.
The initial amount of water in the basin is 5000 ft. The water flows into the basin at a rate of 300 ft per second, so after n seconds, the additional amount of water can be calculated by multiplying the rate by the time, which is 300n. Adding this to the initial amount of water gives the equation y = 5000 + 300n. Option A, y = 5000 + 300n, is the correct equation.