# Question #1b0f0

##### 1 Answer

Jul 17, 2017

#### Explanation:

1st doubling

2nd doubling

3rd doubling

Let the count of hours be

Then if it doubled every hour we would have:

However, it doubles every 15 minutes. There are 4 lots of 15 minutes in every hour so the calculation cycle is:

So for 4 yours we have: