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C. Algebra

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A stack of $10 bills is worth $90 billion dollars. What is the height of the stack in kilometers? Assume each bill is .2 millimeters high.

  • C. Algebra -

    Number of bills = $10,000,000,000 / $10
    = 1,000,000,000
    each bill is 0.2mm = 0.0002m = 0.0000002km
    Total thickness=1,000,000,000*0.0000002km
    (It's a little more than half the distance between New York City and Boston).

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