We are given that 53 white-tail deer were introduced into a state park. The population quadruples every 14 years. We need to find the number of years it takes for the population to reach 630.

Applied MathematicsExponential GrowthPopulation ModelingLogarithms
2025/4/7

1. Problem Description

We are given that 53 white-tail deer were introduced into a state park. The population quadruples every 14 years. We need to find the number of years it takes for the population to reach
6
3
0.

2. Solution Steps

Let P(t)P(t) be the population at time tt years.
The initial population is P(0)=53P(0) = 53.
The population quadruples every 14 years, so P(14)=4×53=212P(14) = 4 \times 53 = 212.
The general formula for exponential growth is:
P(t)=P(0)×(growth rate)(t/time period)P(t) = P(0) \times (growth\ rate)^{(t/time\ period)}
In our case, the growth rate is 4, and the time period is 14 years.
So, P(t)=53×4(t/14)P(t) = 53 \times 4^{(t/14)}.
We want to find the time tt when P(t)=630P(t) = 630.
630=53×4(t/14)630 = 53 \times 4^{(t/14)}
Divide both sides by 53:
63053=4(t/14)\frac{630}{53} = 4^{(t/14)}
Take the natural logarithm of both sides:
ln(63053)=ln(4(t/14))ln(\frac{630}{53}) = ln(4^{(t/14)})
Using the property of logarithms, ln(ab)=b×ln(a)ln(a^b) = b \times ln(a):
ln(63053)=t14×ln(4)ln(\frac{630}{53}) = \frac{t}{14} \times ln(4)
Now, solve for tt:
t=14×ln(63053)ln(4)t = 14 \times \frac{ln(\frac{630}{53})}{ln(4)}
t=14×ln(630/53)ln(4)t = 14 \times \frac{ln(630/53)}{ln(4)}
t14×2.46551.3863t \approx 14 \times \frac{2.4655}{1.3863}
t14×1.7785t \approx 14 \times 1.7785
t24.899t \approx 24.899
Rounding to the nearest hundredth of a year:
t24.90t \approx 24.90

3. Final Answer

24.90

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