a 4 minute egg is cooked for what fraction of an hour?

Right.

To determine the fraction of an hour, we need to convert the given time into minutes, then express it as a fraction of 60 minutes (which is equivalent to an hour).

Since there are 60 minutes in an hour, we need to find the fraction of 60 minutes that corresponds to 4 minutes. To do this, we divide the number of minutes (4) by the total number of minutes in an hour (60):

4 minutes ÷ 60 minutes = 1/15

So the correct answer is indeed 1/15. A 4-minute egg is cooked for 1/15 of an hour.