The formula to find the amount is
[tex] A=P(1+r)^n [/tex]
Here A = amount
P is the principal
r is the rate
n is the number of years
Then to find the interest we subtract principal from amount.
Interest = A - P
Here
P= 2200, r = 3% = 0.03 , n = 6 years
[tex] A = 2200 (1+0.03)^6=2626.92 [/tex]
Hence the interest earned = 2626.92-2200 = $426.92
Now if the total of $2200 was deposited in three banks then each account earns [tex] \frac{426.92}{3}= 142.31 [/tex]
Each account earns $142.31
