416 ounces. 1 gallon makes 128 ounces and 1 ounce is 0.0078 gallon in U.S measure. There are 8 ounces in a cup, 2 cups in a pint, 2 pints in a quart and 4 quarts in a gallon. That makes 128 ounces in a gallon US. In UK 20 ounces to the pint, 8 pints to the gallon which makes 160 ounces Imrerial measure.
3.25 gallons is 52 cups (US).
320 fluid ounces
Start by simplifying the problem. 8 oz to 50 gal is the same as 4 oz to 25 gal. Divide 4 by 25 and you get .16 ounces to one gallon.
fuel = 2 miles / (25 miles/gal) = 2/25 gal = 0.08 gal 1 gal = 8 pint → 2/25 gal = 2/25 × 8 pint = 16/25 pint = 0.64 pint As you use the word "gas" instead of "petrol", I will assume you are American: 1 pt = 16 fl oz → 16/25 pt = 16/25 × 16 fl oz = 10 6/25 fl oz = 10.24 fl oz (just under 10¼ fl oz).
you would use 2 ounces of weed killer per gallon .
4 gal = 512 fl oz
(6 oz per 100 gal) times (20) = (120 oz per 100 gal), or (1.2 oz per gal) .
128 oz
1 US gal is 128 fluid ounces, so 2 gal is 256 fl oz.
50.7 fl oz ÷ 128 fl oz/gal ≈ 0.3961 gal
That is 256 fl oz.
That is 192 fl oz.
That is 192 fl oz.
That is 64 fl oz.