Question

1. Estimate how many pennies it would take to stack them from the earth to the moon. Give your answer in 1000s of dollars.
2. How much would all of these pennies weigh?  Give your answer in tons.
3. Why did I ask you to estimate instead of giving an exact answer?

Be sure to state your assumptions and define your estimations.  Include justification for these.

• Moon is about 238,900 miles (mi) away.
• Penny is 1.52 millimeters (mm) thick.
• There are 25.4 mm in an inch (in).
• There are 5,280 feet (ft) in a mile (mi).
• A penny weighs 2.5 grams (gm) or 0.088 ounces (oz)
• There are 16 ounces in a pound (LB)

Answer 1