How to make it shorter \sqrt{3-2\sqrt{2} }

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.

5,678.321 what place value is the 1 in

What is the exact volume of the cone? (height is 9 cm, the radius is 15 cm)