# 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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