The answer to your question is 21.5
1 gallon = 16 cups. so 16x3.5=56. so 56 cups
For this case we must factor
of the following expression:

By law of signs of multiplication it is fulfilled that:

So we have to:

Thus, by factoring we have:

Answer:

11 units
sin45°=√2 / 2
the length of one leg = √2/2 . 22/√2 = 11