What is the best way to estimate the number of coins in a coin jar? What strategy might you consider? Penny jar Do you know how many pennies are in these rolls? What assumptions are you making? What information do you need? Helpful info https://www.usmint.gov/kids/coinNews/circulating/01centCoin.html http://lifehacker.com/5804773/quickly-estimate-how-much-moneys-in-your-change-jar-by-weight The official weights of contemporary U.S. coins are …