Anutrition expert claims that the average american is overweight. to test his claim, a random sample of 27 americans was selected, and the difference between each person's actual weight and idea weight was calculated. for this data, we have x¯=15.6 and s=27.6. is there sufficient evidence to conclude that the expert's claim is true? carry out a hypothesis test at a 2% significance level.

I’m stuck on this i don’t understand.

Which expression is rational? 6. , square root two, square root 14, square root 49

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.