Question: Chrissy currently has a credit card that charges 18 percent interest annually. She usually carries a balance of about ​$350. Chrissy has received an offer for a new credit card with a teaser rate of 4 percent for the first three ​months; after​ that, the rate increases to 21.5 percent. Assume that interest is compounded and there are 365 days in a year .

Chrissy currently has a credit card that charges 18 percent interest annually. She usually carries a balance of about ​$350. Chrissy has received an offer for a new credit card with a teaser rate of 4 percent for the first three ​months; after​ that, the rate increases to 21.5 percent. Assume that interest is compounded and there are 365 days in a year . What will her total annual interest be with her current​ card? What will her interest be the first year after she​ switches? Should she switch based on the first year​ interest?