Week 25 CMT Style Problem - 6th Grade

The Healthy Heart

The human heart beats billions of times in a lifetime.

It works all day and all night without rest.

A local public service agency is planning a campaign to fight heart disease. You receive the following request from the director.

Please check the accuracy of the enclosed ad before we release it. Is the assertion that a heart beats billions of times reasonable?

Construct a brief report including:

• whether or not you agree with the claim and why;
• your own estimate for how many times a heart beats in a lifetime (explain how you got your estimate so that I can understand it and state any assumptions being used); and
• an explanation of how I can estimate how many times my own heart has beaten. (Today is my 26th birthday.)