Select the correct answer from each drop-down menu.

The population of a small town is decreasing exponentially at a rate of [tex]14.3\%[/tex] each year. The current population is 9,400 people. The town's tax status will change once the population is below 6,000 people.

Create an inequality that can be used to determine after how many years, [tex]t[/tex], the town's tax status will change, and use it to answer the question below.

[tex]\square \left( \square \right)^t \ \textless \ \square[/tex]

Will the town's tax status change within the next 3 years? [tex]\square[/tex]



Answer :

Let's find the right elements to fill in the blanks and answer the question step by step.

### Step 1: Identify the variables and given information.

- Current population ([tex]\(N_0\)[/tex]) = 9,400 people
- Rate of decrease ([tex]\(r\)[/tex]) = 14.3% = 0.143
- Threshold population ([tex]\(P_{\text{threshold}}\)[/tex]) = 6,000 people

### Step 2: Write down the exponential decay formula.

The population after [tex]\(t\)[/tex] years, where the population decreases by a rate [tex]\(r\)[/tex] each year, can be expressed as:
[tex]\[ N(t) = N_0 \cdot (1 - r)^t \][/tex]

### Step 3: Create the inequality.

We need the population to be less than the threshold to trigger the tax status change:
[tex]\[ N_0 \cdot (1 - r)^t < P_{\text{threshold}} \][/tex]

Substitute the given values:
[tex]\[ 9400 \cdot (1 - 0.143)^t < 6000 \][/tex]

So, the inequality is:
[tex]\[ 9400 \cdot (0.857)^t < 6000 \][/tex]

### Step 4: Determine if the town's tax status will change within the next 3 years.

Using the same exponential decay formula to find the population after 3 years:
[tex]\[ N(3) = 9400 \cdot (0.857)^3 \][/tex]

From the given result, we know that after 3 years:
[tex]\[ N(3) = 5916.574254199999 \][/tex]

Since 5916.574254199999 is less than 6000, the population will indeed be below the threshold.

### Final step: Fill in the blanks and select the correct answer.

The inequality is:
[tex]\[ 9400 \ (0.857)^t < 6000 \][/tex]

Will the town's tax status change within the next 3 years? Yes.

So, the correct selections are:
- [tex]\(9400\)[/tex]
- [tex]\((0.857)\)[/tex]
- [tex]\(6000\)[/tex]
- Yes