The interest earned on the investment f $6,599.20 earns 4.2% interest compounded monthly is $2,250.96
The compound interest is the interest added on a sum of money invested over a period of time. The formula for calculating the compound interest is expressed as:
A = P(1+r/n)^nt
Given the following
P = $6,599.20
r = 4.2% = 0.042
n = 12 (monthly)
t = 7 years
Substitute
A = 6,599.20 (1+0.042/12)^7(12)
A = 6,599.20 (1.0035)^84
A= $8,850.20
Interest = $8,850.20 - $6,599.20
Interest = $2,250.96
Hence the interest earned on the investment f $6,599.20 earns 4.2% interest compounded monthly is $2,250.96
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