Sarah is ordering cheese pizza for a party of 10 people. She knows that each pizza has 8 slices. To figure out how many pizzas to order, Sarah needs to know the

Sarah knows each pizza has 8 slices, but she still needs to estimate how many slices the 10 people will eat altogether. Knowing the average number of slices each person will eat lets her calculate the total slices needed and divide by 8. The cost, drink preferences, and delivery person's carrying capacity do not determine how much pizza the guests need.

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