Two barrels are filled with water. One holds 50 us quarts and the other one holds 50 British quarts. Determine the difference between their volumes in litres.

(1) I'm surprised they didn't give you the conversion factors, but 1 US gallon = 4/5 of a UK gallon, so 50 US gallons = 40 UK gallons and the other one holds 50 UK quarts = 12.5 UK gallons (4 quarts to the gallon) so the difference in size (12.5 g and 40 g) is 27.5 gallons. 1 UK gallon = 4.5 litres so the difference in size is 27.5 x 4.5 litres = 123.75 litres (2) You have a slight typo - according to you he buys $12 at a time - I assume you mean 12 chickens at a time! Each bird costs 30 c per lb for processing so that is 30c x 7 x 12 = $25.20. Each bird costs $2.75 per kilo and since 1 kg = 2.2 lb, that is $2.75 / 2.2 per lb = $1,25 per lb so at 7 lb average weight that is 7 x $1.25 each, so since he buys 12 that is 12 x 7 x $1.25 = $105 for the birds, so adding on the processing charge that gives a total of $130.20 for 12 birds (3) To change F to C, subtract 32, and multiply by 5/9, so the answer is 100 degrees C