Help me please need to ace this test to go to highschool please help

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

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false

3/4 + p = 1/2? i’m not sure how to solve it