Consider a Human Heart Rate of 80 Beats Per Minute

Multiple Choice

Consider a human heart rate of 80 beats per minute. If someone's heart beats at that rate over a 70-yr lifetime, how many times would it beat?

A) 1.78 × 10⁷
B) 2.20 × 10⁹
C) 3.26 × 10¹⁰
D) 2.95 × 10⁹
E) 7.44 × 10⁵