11,798.786 gallons (Don't know what place you want it rounded to, if at all) Assuming 3% evaporates per day, that is how many gallons will be left after 10 days.
Answer:
6.875
Step-by-step explanation:
Used a calculator to solve this one, it might be incorrect, i suggest doing some extra research on how to solve to see if you get this answer ;)
Answer:

Step-by-step explanation:
Let us assume that the total cost of the grapes = x $.
Given that it costs 1.55 $ for one pound. We are asked to determine how much it would cost for 3.5 pounds.
note that for one pound you pay 1.55 so how much should you pay for 3.5 pounds? Clearly, the cost increases with the increase in weight of the item.
This is equal to 

Hence, the answer.