# The amount of information retained varies inversely with the number of hours passed since the information was given. If Diana can retain 20 new vocabulary words 1/4 hour after she learns them, how many will she retain 2.5 hours after she reads them?

##### 1 Answer

May 31, 2016

#### Answer:

2 item retained after

#### Explanation:

Let information be

Let time be

Let the constant of variation be

Then

Given condition is

Multiply both sides by 0.25

But

Thus:

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Thus after