High School

If [tex]f(4)=246.4[/tex] when [tex]r=0.04[/tex] for the function [tex]f(t)=P e^{e^t}[/tex], then what is the approximate value of [tex]P[/tex]?

A. 289
B. 50
C. 210
D. 1220

Answer :

To solve the problem, we need to find the value of [tex]\( P \)[/tex] in the function [tex]\( f(t) = P e^{e^t} \)[/tex] given that [tex]\( f(4) = 246.4 \)[/tex] and [tex]\( r = 0.04 \)[/tex]. However, the value of [tex]\( r \)[/tex] is not needed for our calculations.

Here's a step-by-step breakdown:

1. Understand the Function: The function is given as [tex]\( f(t) = P e^{e^t} \)[/tex]. We are tasked with finding [tex]\( P \)[/tex].

2. Substitute Known Values: We know that [tex]\( f(4) = 246.4 \)[/tex]. Therefore:
[tex]\[
246.4 = P \, e^{e^4}
\][/tex]

3. Calculate [tex]\( e^4 \)[/tex]: The value [tex]\( e^4 \)[/tex] is the natural exponential function with exponent 4.

4. Calculate [tex]\( e^{e^4} \)[/tex]: You need to exponentiate the result from the previous step, which involves another exponential function.

5. Solve for [tex]\( P \)[/tex]: Since [tex]\( 246.4 = P \cdot e^{e^4} \)[/tex], solve for [tex]\( P \)[/tex] by dividing both sides by [tex]\( e^{e^4} \)[/tex]:
[tex]\[
P = \frac{246.4}{e^{e^4}}
\][/tex]

6. Calculate the Result: Upon evaluating [tex]\( e^{e^4} \)[/tex], you find that [tex]\( e^{e^4} \)[/tex] is a very large number. When you divide [tex]\( 246.4 \)[/tex] by this large number, [tex]\( P \)[/tex] turns out to be a very small number in scientific notation:
[tex]\[
P \approx 4.785919858612588 \times 10^{-22}
\][/tex]

Based on this calculation, [tex]\( P \)[/tex] does not match any of the options given: 289, 50, 210, or 1220. This indicates that the options may have been intended for a different set of conditions or calculations. Nonetheless, [tex]\( P \)[/tex] is approximately [tex]\( 4.786 \times 10^{-22} \)[/tex].