Every 5 1/2 cups of flour weighs 1 9/16 pounds. Use a unit rate to show how you could determine if there are more than or less than 35 cups of flour in a 10-pound bag of flour.
OK..... the unit rate is how much a cup of flour weighs......or pounds per cup or lbs/cup
From th info given 5 1/2 cups weighs 1 9/16 lbs (lbs is an abbreviation for pounds)
Substitute these values
(1 9/16) lbs / (5 1/2 cups) = ???? lbs/cup
Doing the math
(1 9/16)/ (5 1/2) = (25/16)/ (11/2) = 25/16 X 2/11 = .284 lbs/cup OK so far?
Now lets see if 35 cups is more or less than 10 lbs (what the question asks)
(35 cups) x ( .284 lbs/cups) = 9.943 lbs not QUITE ten pounds ....so there must be a bit more than 35 cups in there to make it 10 pounds
