You calculate that your semester average in history is 97.5. when you get your report card, your average is 96. what was the percent error of your calculation?

The percentage error is 1.56 %.

Explanation:

To calculate the percentage error, we use the equation:

We are given:

Experimental value of an average = 97.5

Accepted value of an average = 96  

Putting values in above equation, we get:

Hence, the percentage error in our calculation is 1.56 %.

yes

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answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.