Do anybody wanna remind, or no?

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

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.

Which number produces an irrational number multiplied by 1/3