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Question: solve using visual representation a a whole leftover lasagna was...

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Solve using visual representation

a. A whole leftover lasagna was in the refrigerator. Each night a lasagna lizard came and ate half of the lasagna that was there. After 4 nights, how much lasagna would he have eaten?

b. In general, after n nights, how much lasagna was left (give an answer in terms of n)? Why does this formula make sense – how do you know it will work for any n?

c. If the lizard had only eaten 1/3 of the remaining lasagna each night, how much of the whole lasagna would he have eaten after 3 nights?

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