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Suppose that when your friend was born, your friend's parents deposited $9000 in an account paying %6.6 interest compounded . What will the account balance be after 13 years

Sagot :

We are given the following information

Deposited amount = P = $9000

Interest rate = r = 6.6% = 0.066

Compounding interval = n = quarterly = 4

Number of years = t = 13

We are asked to find the accumulated amount (or ending balance)

Recall that the compound interest formula is given by

[tex]A=P(1+\frac{r}{n})^{n\cdot t}[/tex]

Where

A = Accumulated amount (or ending balance)

P = Deposit amount

r = Interest rate in decimal

n = Number of compounding in a year

t = Number of years

Now let us substitute the given values into the above formula

[tex]\begin{gathered} A=P(1+\frac{r}{n})^{n\cdot t} \\ A=9000\cdot(1+\frac{0.066}{4})^{4\cdot13} \\ A=9000\cdot(1+0.0165)^{52} \\ A=9000\cdot(1.0165)^{52} \\ A=\$21077.85 \end{gathered}[/tex]

Therefore, after 13 years, the account balance will be $21077.85