Identify the level of measurement of the data, and explain what is wrong with the given calculation. in a set of data, car rankings are represented as 10 for first comma 20 for second comma and 30 for third. the average (mean) of the 704 car rankings is 25.4 .

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.