Answer:20
Step-by-step explanation:
Answer:
17.
Step-by-step explanation:
<u>Divide 85 by 5 to find the unit rate:</u>
<u />
17 represents the amount of pages printed for 1 minute.
Let Issac work for x hours, and Ruby works 8 hours more than of Issac, so Ruby work for
hours.
And Svetlana worked four times of Ruby, therefore Svetlana worked for

And total hours they worked together is 136. That is

So Issac worked for 16 hours, Ruby worked for 24 hours and Svetlana worked for 24 times 4 equals 96 hours .