2,200 after 3 years if the account pays 8.4%

i have no clue what this is

What is the question?

It helps to post the complete question even though there is more typing to do.
I suppose the question requires you to calculate the original deposit (principal) three years ago.

At 8.4% p.a. compound interest,
$1000 will yield 1000*(1.084³) after three years, or $1273.76.

If the combined interest and principal after three years is $2200, the the principal can be calculated by proportion, namely
P=1000*(2200/1273.76)=$1727.17

So check if my assumptions correspond to those of the question. If not, please post the complete question.

This appears to be a financial question related to calculating the amount of money in an account after a certain number of years. To solve this problem, we need to use the concept of compound interest.

Compound interest is the interest calculated on both the initial principal amount and any accumulated interest from previous periods. It is different from simple interest, which is calculated only on the principal amount.

In this case, you are given the following information:
- Initial amount (principal): $2,200
- Time period: 3 years
- Interest rate: 8.4% (as a decimal, which is 0.084)

We can use the formula for compound interest to calculate the final amount (A) in the account after the given time period:
A = P*(1 + r)^n

Where:
A = Final amount
P = Initial principal amount
r = Annual interest rate (as a decimal)
n = Time period in years

Plugging in the values into the formula, we can calculate the final amount:

A = 2,200 * (1 + 0.084)^3

To solve this equation, you can use a calculator or a mathematical software program. The result will give you the final amount after 3 years, considering compounding interest.