It takes about 15 minutes for a heart to beat 1000 times.

On January 10, 2000, your heart would have beat about 1 million times.

Complete Solution:
By estimating, you can often find a reasonable answer more quickly. Round your number of heartbeats to a number that is easy to use for calculation. For example, if your heart beats 72 times per minute, 70 beats per minute would give a reasonable estimate.

 Beats per Hour Beats per Day Estimated Beats per Day 70 × 60 = 4,200 4,200 × 24 = 100,800 4,000 × 25 = 100,000

Next find how many days it takes for 1 million heartbeats:

1,000,000 ÷ 100,000 = 10.
Thus, 1,000,000 beats take 10 days.

If you begin counting on January 1, the millionth beat will be on January 10. For 1 billion heartbeats, the number of days is 1,000,000,000 ÷ 100,000 = 10,000. Since there are 365 days in a year, and 10,000 ÷ 365 is approximately 27.4, it will take about 27.4 years. The billionth beat will be in May 2027.

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