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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 a day?
Sum
Solution
Heartbeat per minute = 80 beats
In a day
One day = 24 hours
= 24 × 60 minutes
∴ Heartbeat in one day = 24 × 60 × 80
= 24 × 4800
= 115200
= 1.152 × 105
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Chapter 1: Numbers - Exercise 1.7 [Page 47]
