HELP ME PLZPLZPZLZLZLZ

Issof claims that the scale factor is 1/2. which statement about his claim is correct

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

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.