Approximately how many times does an average human heart beat in a lifetime? A) 3 × 10¹¹ B) 3 × 10¹⁰ C) 3 × 10⁹ D) 3 × 10⁸ E) 3 × 10⁷

Question

Quizplus · Accepted Answer

An average heart rate is 72 beats per minute. Therefore, in an hour it beats 72 x 60 = 4,320 times. In a day it can beat 4,320 x 24 = 103,680 times. In a year it can beat around 37,843,200 times (assuming 365 days in a year). Therefore, over an average lifetime of 80 years, the heart would beat 37,843,200 x 80 = 3,027,456,000 times, which can be approximated to 3 × 10¹⁹. Therefore, the closest answer option is C.

Approximately How Many Times Does an Average Human Heart Beat