Lizzy: Every day, Billie bakes 3 pumpkin pies for 11 days and puts them in the refrigerator. It takes 2 cans of whipped cream to cover 1 pie. If Tiffany comes over and eats 4 pies, how many cans of whipped cream does Billie need to buy to cover the remaining pies?.
Me: Hmmm, let me think. I think this is the detailed solution:
In total Billie bakes 3 x 11 = 33 pies. After Tiffany eats the pies, this many pies are in the refrigerator: 33 - 4 = 29 pies. She needs to buy this many cans of whipped cream 29 x 2 = 58 cans. Final answer: 58.