Assume a resting heart rate of for an average human
MATHEMATICS · Multi-part · CBSE · Mathematics · Power Play · Power Play
Problem
Assume a resting heart rate of 72beatsmin−1 for an average human. If the average life expectancy is 75years, estimate the total number of heartbeats in one lifetime.
Proceed as outlined below.
(i) Convert 75years into the total number of minutes, showing all steps clearly.
(ii) Using the resting heart rate, calculate the lifetime total number of heartbeats and present your answer in scientific notation with two significant figures.
(iii) Give the order of magnitude of the result and discuss briefly whether occasional variations in heart rate would significantly alter this order of magnitude.