Two trains leave the station at the same time, one heading east and the other west. the eastbound train travels at 75 miles per hour. the westbound train travels at 55 miles per hour. how long will it take for the two trains to be 234 miles apart?

Candice uses the function f(t)=t+100−−−−−−√ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days