Question

Roger has a nail that is 12 centimeters long he measures and records the length of the nail at 15 centimeters what is the percent of error in his measurement

Answer 1

20% because the 15-12=3 and then you cross multiply 3 and 100 and then you divide by 15. Which is 20.
3. x
-- --
15 100

Answer 2

The percent of error in his measurement is:

25%

Explanation:

The percent error is calculated by the formula:

`\text{Percent error}=\frac{|\text{Recorded measurement-Actual measurement}|}{\text{Actual measure}}* 100`

Roger has a nail that is 12 centimeters long he measures and records the length of the nail at 15 centimeters.

Hence,

`\text{Percent error}=(|15-12|)/(12)* 100\\\\\text{Percent error}=(3)/(12)* 100\\\\\text{Percent error}=25\%`

Hence, the percent error is: 25%.