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Select the correct answer.

Paul is gathering data about moss growth in a local forest. He measured an area of 11 square centimeters on one particular tree and will come back in 6 months to measure the growth of the moss. If the area covered by moss multiplies by one and a half times each month, approximately how much area will the moss cover when Paul returns?

A. [tex]\( 125.3 \, cm^2 \)[/tex]
B. [tex]\( 99.1 \, cm^2 \)[/tex]
C. [tex]\( 14.7 \, cm^2 \)[/tex]
D. [tex]\( 16.5 \, cm^2 \)[/tex]

Answer :

To solve the problem of determining how much area the moss will cover after 6 months, we know that the moss grows by one and a half times each month.

1. Initial Area: The initial area covered by moss is 11 square centimeters.

2. Growth Rate: The growth rate is 1.5 times the current area every month.

3. Time Period: We are asked to find the moss-covered area after 6 months.

To find the final area after 6 months, you can follow these steps:

- Each month, the area is multiplied by 1.5, so after 1 month, the area will be [tex]\(11 \times 1.5\)[/tex].
- After 2 months, it will be [tex]\((11 \times 1.5) \times 1.5\)[/tex].
- Similarly, after 6 months, the area will be multiplied by 1.5 each month for 6 months.

This can be expressed mathematically as:

[tex]\[
\text{Final Area} = \text{Initial Area} \times (\text{Growth Rate})^{\text{Number of Months}}
\][/tex]

Substitute the given numbers:

[tex]\[
\text{Final Area} = 11 \times (1.5)^6
\][/tex]

When you calculate this using the above formula, the final area covered by the moss after 6 months will be approximately 125.3 square centimeters.

Therefore, the correct answer is A. 125.3 cm².

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