In △abc,

ad

and

be

are the angle bisectors of ∠a and ∠b and

de

║

ab

. find the length of

de

if perimeter of abde is 30 cm and ab = 12 cm.

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