Math please help as fast as u can

Complete the steps to find 4.830 ÷ 5

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.

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work