Estimate the Number of Times an Average Person's Heart Beats $69 \text { beats } / \mathrm { min }$

Multiple Choice

Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is $69 \text { beats } / \mathrm { min }$ and a life span of 75 years.

A) 3 × 10⁹ beats
B) 3 × 10⁸ beats
C) 3 × 10¹⁰ beats
D) 3 × 10⁷ beats