Question 346168
In 2007, Procter and Gamble spent $5.2 billion on advertising. Express this quantity in terms of the height in kilometers of a stack of $1 bills. Assume 10 bills per millimeter.
.
$5.2 billion 
number of 1-dollar bills:
5200000000
.
5200000000/10 = 520000000
So, the height is
520000000 millimeter
520000 meters
520 kilometers