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Scientists studied a deer population for 10 years and generated the function [tex]\( f(x) = 248(1.15)^x \)[/tex] to approximate the number of deer in the population [tex]\( x \)[/tex] years after beginning the study.

About how many deer are in the population 3 years after beginning the study?

A. 251
B. 377
C. 856
D. 1,003

Sagot :

To determine the deer population 3 years after the beginning of the study, we'll use the given function [tex]\( f(x) = 248(1.15)^x \)[/tex] where [tex]\( x \)[/tex] represents the number of years.

1. Identify the known values:
- The initial population of deer, [tex]\( P_0 = 248 \)[/tex].
- The growth rate per year, [tex]\( r = 1.15 \)[/tex].
- The number of years after the beginning of the study, [tex]\( x = 3 \)[/tex].

2. Substitute [tex]\( x = 3 \)[/tex] into the function [tex]\( f(x) \)[/tex]:
[tex]\[ f(3) = 248 \times (1.15)^3 \][/tex]

3. Calculate the value of [tex]\( (1.15)^3 \)[/tex]:
- This exponentiation step modifies the growth rate applied over 3 years.

4. Multiply the initial population by the result of the exponentiation:
[tex]\[ f(3) = 248 \times (1.15)^3 \][/tex]

Following these calculations, the number of deer in the population 3 years after the study began is approximately:
[tex]\[ 377 \][/tex]

Thus, the correct answer is:
[tex]\[ 377 \][/tex]