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Cynthia is training to run the 100-yard dash. Each week she records her best 100-yard dash time so that she can track her improvement. The table shows her best times after each of the first 3 weeks of training.



Week Time (s)
1 14.0
2 13.5
3 13.1


Find the percent of change from Week 1 to Week 2, and from Week 2 to Week 3. Round to the nearest tenth percent if necessary. Explain how you solved the problem.

Input Field 1 of 1

Sagot :

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Answer:

Step-by-step explanation:

Percent change = (Change/Original)  

For Week 2 the % change is [(13.5-14)/14]*100%

For week 3 the % change is [(13.1-13.5)/13.5]*100%

Week Time(s) Change % Change

   1            14  

   2           13.5 -0.5        -3.57%          

   3           13.1 -0.4        -2.96%

The negative value for percent change reflect the drop in time (an improvement, but not a positive number.  

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