this question 5 A stack of boxes has 8 layers If the first layer has 20 boxes and the last layer has 13 boxes, how many boxes are in the stack

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this question 5  A stack of boxes has 8 layers  If the first layer has 20 boxes and the last layer has 13 boxes, how many boxes are in the stack

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Question: this question 5. A stack of boxes has 8 layers. If the first layer has 20 boxes and the last layer has 13 boxes, how