Need help figuring out what is the largest amount:

3000 c
400 pt
250 qt
500 gal

http://www.mathsisfun.com/measure/us-standard-volume.html

500 gallons, is this correct

Right.

To find out which amount is the largest among 3000 c, 400 pt, 250 qt, and 500 gal, we need to compare the units and convert them to a common unit of measurement.

First, let's look at the units:
- "c" typically stands for cups
- "pt" stands for pints
- "qt" stands for quarts
- "gal" stands for gallons

To make the comparison easier, we can convert all the units to gallons since it is the largest unit among the options.

1 cup (c) is equivalent to 0.0625 gallons.
1 pint (pt) is equivalent to 0.125 gallons.
1 quart (qt) is equivalent to 0.25 gallons.
1 gallon (gal) is equal to 1 gallon.

Now, let's convert the amounts to gallons:
- 3000 c * 0.0625 gallons/c = 187.5 gallons
- 400 pt * 0.125 gallons/pt = 50 gallons
- 250 qt * 0.25 gallons/qt = 62.5 gallons
- 500 gal * 1 gallon/gal = 500 gallons

After converting all the amounts, we find that 500 gallons is the largest amount among 3000 cups, 400 pints, 250 quarts, and 500 gallons.