Oi received a statement on her Certificate of Deposit showing that her investment had returned $4,836 over its life. If the Certificate of Deposit pays a simple interest rate of 3.1% and her initial investment was $19,500, how long had the money been invested?

In the figure below, segment ac is congruent to segment ab: which statement is used to prove that angle abd is congruent to angle acd? a.)triangle acd is similar to triangle abd. b.)triangle acd is congruent to triangle abd. c.)segment a.d. is congruent to segment ac. d.)segment a.d. is congruent to segment dc.