Eleni bought 2 pounds of grapes at a cost of $3.49 per pounds. she paid with a $10 bill. how much change did she get back?

She gets $3.02 back because 3.49 (2) = 6.98. subtract 6.98 from 10 and you get 3.02!

If each pound costs 3.49 and we need two of them, then the total cost of the grapes is ...

3.49 x 2 = 6.98

If Eleni pays with a $10 bill, she will get the following change back ...

10 - 6.98 = $3.02 back