If you had invested only 1 month´s worth of the emergency fund in the savings account at a 3.15% apr and the remainder in the 45-day cd at a 4.65% apr. what is the difference in the interest earned in 45 days when compared with question three? question three was- your fixed expenses are $1,500.45 a month. your emergency fund has four month´s worth of coverage. you invest half in a savings account with an interest rate of 3.15% apr and the other half in a 45-day cd with an interest rate of 4.65% apr. how much is your total interest in 45 days? i got $28.85 for this.

I answered this question before.

Given:
Fixed monthly expenses: $1,500.45
Emergency fund is 4 month's worth: 1,500.45 x 4 = 6,001.80

Question 3:
Half of the emergency fund is invested in savings account with interest rate 3.15% APR
Half of the emergency fund is invested in 45-day CD with an interest rate of 4.65% APR.

6,001.80 * 1/2 = 3,000.90 * 3.15% * 45/360 = 11.82
6,001.80 * 1/2 = 3,000.90 * 4.65% * 45/360 = 17.44
                                                                                 29.26

1 month's worth of the emergency fund in the savings account and the remainder in the 45-day CD.

6,001.80 * 1/4 = 1,500.45 * 3.15% * 45/360 =   5.91
6,001.80 * 3/4 = 4,501.35 * 4.65% * 45/360 = 26.16
                                                                                  32.07