Fannie has a credit card that uses the average daily balance method. for the first 16 days of one of her billing cycles, her balance was $1050, and for the last 14 days of the billing cycle, her balance was $1280. if her credit card's apr is 19%, which of these expressions could be used to calculate the amount fannie was charged in interest for the billing cycle? a.(0.19/365*30)(14*1050+16*1280/30) b.0.19/365*30)(16*1050+14*1280/30) c.0.19/365*31)(14*1050+16*1280/31) d.0.19/365*31)(16*1050+14*1280/31)