Chapter 11.3, Problem 8E

To determine

To find: The amount of information that is retained two weeks after learning.

Answer to Problem 8E

The percent of information that is retained after two weeks is $42.69\%$ .

Explanation of Solution

Given:

The given formula is,

  $p=\left(100-a\right)e^{-bt}+a$

The value of $a$ is 18 and $b$ is 0.6.

Calculation:

Consider the formula is,

  $p=\left(100-a\right)e^{-bt}+a$

Then, after two weeks,

  $\begin{array}{c}p=\left(100-18\right)e^{-\left(0.6\right)\left(2\right)}+18\\ =42.6979\end{array}$