Question

alex measured the length of an item to be 3.9 cm. the actual length is 3.5 cm what is alex percent error ?

Answer 1

Answer:

11.42 %

Explanation:

The formula for calculating percentage error

percentage error = observed value - actual value x 100

     actual value

Percentage error =    3.9- 3.5  x 100

    3.5

Percentage error = 0.4  x 100

                             3.5

Percentage error =0.1142 x 100

Percentage error = 11.42 %