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The population, [tex]p[/tex], of a town after [tex]t[/tex] years is represented using the equation [tex]p = 10000(1.04)^{-t}[/tex]. Which of the following is an equivalent expression?

A. [tex]p = 10000\left(\frac{1}{25}\right)^t[/tex]

B. [tex]P = 10000\left(\frac{25}{26}\right)^t[/tex]

C. [tex]p = 10000\left(\frac{26}{25}\right)^t[/tex]

D. [tex]p = 10000\left(\frac{25}{1}\right)^t[/tex]

Answer :

Sure! Let's solve the problem step-by-step.

We are given the population function:
[tex]\[ p = 10000(1.04)^{-t} \][/tex]

We need to find an equivalent expression from the provided options.

First, let's understand what the given expression means. The base [tex]\( 1.04 \)[/tex] raised to the power of [tex]\(-t\)[/tex] can be rewritten using the properties of exponents:

[tex]\[ (1.04)^{-t} = \left(\frac{1}{1.04}\right)^t \][/tex]

Next, we need to simplify [tex]\( \frac{1}{1.04} \)[/tex] to see which of the provided options it matches. To do this, we recognize that:

[tex]\[ 1.04 \approx \frac{26}{25} \][/tex]

Therefore:

[tex]\[ \frac{1}{1.04} \approx \frac{1}{\frac{26}{25}} = \frac{25}{26} \][/tex]

Now substituting this back in:

[tex]\[ \left(\frac{1}{1.04}\right)^t \approx \left(\frac{25}{26}\right)^t \][/tex]

Thus, the expression [tex]\( 10000(1.04)^{-t} \)[/tex] can be equivalently written as:

[tex]\[ p = 10000\left(\frac{25}{26}\right)^t \][/tex]

So, the correct answer is:

[tex]\[ p=10000\left(\frac{25}{26}\right)^t \][/tex]

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