The difference in the interest earned by the two accounts is $45.
Interest is the amount of money that accrues on the amount of money deposited. Interest increases the value of the amount deposited.
Interest = principal x time x interest rate
Interest earned in the first bank = $4000 x 0.0525 x (6/12) = $105.
Interest earned in the second bank = $2000 x 0.06 x 6/12 = $60
Difference in the interest earned = $105 - $60 = $45
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