<u><em>Answer:</em></u>
She stayed awake for 295 minutes today
<u><em>Explanation:</em></u>
<u>We are given that:</u>
Yesterday, she drank one cup
Today, she drank
of a cup more than yesterday
<u>This means that:</u>
Number of cups she drank today = 
Now, we know that she drinks
of a cup per hour any time she is not sleeping
We use cross multiplication to get the time she took to drink
cups
1 hour ...........................>
of a cup
?? hours ......................>
cups
Time taken = 
This means that she was awake for
hours
<u>Finally, we convert this to minutes:</u>
Knowing that 1 hour has 60 minutes, therefore:
She stayed awake for
minutes
Hope this helps :)