precalc
posted by Rebekah .
Let a subscript n be the remainder when n is divided by 5.
a)find a subscript 11 and a subscript 400
b) if a subscript m =3, find a subscript (m +4)

what do you get? Just do the divisions and find the remainder. dividing by 5 is particularly easy, since numbers ending in 04 and 59 have remainders 04.