NEED HELP ASAP The gates of an amusement park are closely monitored to determine whether the number of people in the amusement park ever poses a safety hazard.

On a certain day, the rate at which people enter amusement park is modeled by the function e(x)=0.03x3+2, where the rate is measured in hundreds of people per hour since the gates opened. The rate at which people leave the amusement park is modeled by the function l(x)=0.5x+1, where the rate is measured in hundreds of people per hour since the gates opened.

What does (e−l)(4) mean in this situation?

A) The rate at which the number of people in the park is changing 4 hours after the gates open is 692 people per hour.

B) There are 692 people in the amusement park 4 hours after the gates open.

C) There are 92 people in the amusement park 4 hours after the gates open.

D) The rate at which the number of people in the park is changing 4 hours after the gates open is 92 people per hour.