(a) At the time of this book’s printing, the U.S. national debt is about $ trillion. If payments were made at the rate of $1 000 per second, how many years would it take to pay off the debt, assuming no interest were charged?
(b) A dollar bill is about cm long. How many dollar bills attached end to end would it take to reach the Moon? The front endpapers give the Earth–Moon distance.d= r=
y=