Question

Give the answer in scientific notation:

A human heartbeats at an average of 80 beats per minute. How many times does it beat in 100 years?

Answer 1

Heartbeat per minute = 80 beats

100 years

Heartbeats in one year = 4.2048 × 10⁷

Heartbeats in 100 years = 4.2048 × 10⁷ × 100

= 4.2048 × 10⁷ × 10²

= 4.2048 × 10⁹