It's a dimensional analysis problem but you don't have to solve it. I just need to know how many sig figs would the answer have. The numbers (with units) used are:
1 mol pennies
1 mol dollars per 100 mol pennies
6.02 x 10^23 dollars per 1 mol dollars
1 in oer 1,000,000 dollars
1 ft per 12 in
1...