Explanation:
my opinion based on the work I have done is that I have learnt that that a tropical cyclone can damage your life severely, as it destroy everything in its wake.People are left homeless and helpless. It has always been feared by humans and even though precautions are taken to save one , the damages cannot be prevented.
Your example shows that you add a 0 to the end of how many heartbeats you get throughout 6 seconds which was 7 so that would give you 70, however in Sarah's example it doesn't tell us how many times her heartbeats in 6 seconds so I can't give you the answer, but if that's how the question is supposed to be then the answer would be 60 for all.
I hoped that helped! Let me know if you have any questions!
Have a great day/night! :)