Suppose you work at a bowling alley. After work one day, you decide to line up bowling pins in a triangular pattern with one pin in the first row, two pins in the second, three pins in the third, and so on. a. How many total pins would you need to use to complete four rows? b. How many total pins would you need to use to complete ten rows? с. How many total pins would you need to use to complete one hundred rows? How about one thousand rows?

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