Finding compound interest formula

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SUMMARY

The compound interest formula for continuously compounded interest is defined as A = P0ert, where A is the amount, P0 is the principal, r is the interest rate, and t is time in years. A participant in the discussion incorrectly proposed A(t) = 500 × 6.5t as the formula, leading to confusion regarding the base of the exponent. The correct understanding is that the base e is used for continuous compounding, as established in financial mathematics. Resources such as Khan Academy provide further clarification on this topic.

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Homework Statement
please see below
Relevant Equations
please see below
For this part (a),
1686806444867.png

I got ##A(t) = 500 \times 6.5^t## where t is in years. Does someone please know whhy their function is to base e? Is it because the money is compounded continuously?

Many thanks!
 
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ChiralSuperfields said:
Homework Statement: please see below
Relevant Equations: please see below

For this part (a),
View attachment 327892
I got ##A(t) = 500 \times 6.5^t## where t is in years. Does someone please know whhy their function is to base e? Is it because the money is compounded continuously?
Yes, and because the formula for interest compounded continuously is defined as ##A = P_0e^{rt}##. Most textbooks that discuss compound interest and in particular, interest compounded continuously, will develop this formula.

I don't know how you came up with 6.5 as the base. Was it as simple as adding 1 and 5.5? That's wrong for several reasons.
 
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