What is the answer to this problem

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

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.