A^2 - b^2 = (a-b)(a+b)
To test it, expand the right hand side.
The stack of cards are 1 inch tall all together taking up 8 inch’s (cubed)or half of the space
There would be 2 groups. The greatest amount in each pile is 2 cards.
By 91 dollars
because 22.75 times 4 is 91
It is 2.56 because per pound equals the amount
