# How many times does your heart beat during your lifetime

Asked by wiki @ in **Physics** viewed by 800 People

How many times does your heart beat during your lifetime? Round the answer to the nearest power of 10 and then express your answer as the order of magnitude. For instance, if your estimated answer is 3×105, enter 5. If your estimated answer is 8.7×105, you should enter 6 (rounding up to the next power of 10).