Awall is y meters long. two-thirds of the length of the wall is covered with stucco. the rest is covered
with stone. express the length of the wall that is covered in stone. use in diagram form .

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

How to do this , and can some one explain

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