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S_A_V [24]
3 years ago
9

If the interest rate on a savings account is 0.018%, approximately how much money do you need to keep in this account for 1 year

to earn enough interest to cover a single $9.99 Below-Minimum-Balance Fee?
Mathematics
2 answers:
Degger [83]3 years ago
6 0

The <em>correct answer</em> is:

$9.99

Explanation:

The formula for compound interest is

A=p(1+r)^t, where A is the total amount, p is the principal invested, r is the interest rate as a decimal number, and t is the number of years. In our problem, A is 9.99 (enough to cover the fee); p is unknown; r is 0.018% = 0.018/100 = 0.00018; and t is 1:

9.99=p(1+0.00018)^1 \\ \\9.99=p(1.00018)^1 \\ \\9.99=p(1.00018) \\ \\\frac{9.99}{1.00018}=\frac{p(1.00018)}{1.00018} \\ \\9.99=p

Diano4ka-milaya [45]3 years ago
3 0
<span>We are not told how often the interest is compounded, so assuming it is <em /><u><em>compounded yearly</em></u>, you need to keep $9.99 in the account to pay the fee.

<u><em>Explanation: </em></u>
Compound interest follows the formula A=p(1+r)^t,
where:
A is the total amount in the account,
p is the amount of principal,
r is the interest rate as a decimal number,
and t is the number of years.

<u>For our problem: </u>
A = 9.99,
p is unknown,
r = 0.018% = 0.00018,
and t=1.

<u>This gives us: </u>
9.99=p(1+0.00018)^1;
9.99=p(1.00018).

<u>Divide both sides by 1.00018: </u>
9.99=p.</span>
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