Need to know length of x

Trey has answered 15 e-mails. this is 20% of e-mails he must answer. how many e-mails does he need to answer? pls ; op'; ; p'[o; pio; uiylutryte

In 313 ad the roman emperor constantine l published the edict of milan, which established a.) paganism was outlawed in the empire. b.) it was illegal for soldiers to be christians. c.) christians were freed from religious penalties. d.) all roman citizens were required to convert to christianity.

In your opinion, what is the most effective way to rehabilitate a juvenile offender? explain.