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.
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).
To find the height of the stack in kilometers, we need to follow a series of steps.
First, we need to determine the total number of $10 bills in the stack. We can do this by dividing the total value of the stack, which is $90 billion dollars, by the value of each bill, which is $10.
$90 billion ÷ $10 = 9 billion $10 bills
Next, we need to find the total height of the stack in millimeters. We can do this by multiplying the number of bills by the height of each bill.
9 billion bills × 0.2 millimeters = 1.8 billion millimeters
Since we want to express the height in kilometers, we need to convert millimeters to kilometers. There are 1,000,000 millimeters in a kilometer.
1.8 billion millimeters ÷ 1,000,000 = 1800 kilometers
Therefore, the height of the stack of $10 bills is 1800 kilometers.