The beginning balance of cooper's savings account for the month of september was $5700, and it remained this way for the first 11 days of the month. on september 12, cooper made a withdrawal of $900, so his balance changed, and it remained the same for a total of 9 days. on september 20, cooper made a deposit of $1100, so his balance changed again, and it remained the same for a total of 10 days to finish out the month. cooper's savings account has an apr of 3.65%, calculates interest daily, and pays interest at the end of the month. cooper wants to calculate the amount he earned in interest during the month of september what interest rate does cooper's savings account pay per day? how much did cooper earn in interest during the first 11 days of september? how much did cooper earn in interest during the next 9 days of september? how much did cooper earn in interest during the last 10 days of september?