Which of the following numbers is irrational? negative 9 over 5, square root of 5, 7 over 3, square root of 9

negative 9 over 5
square root of 5
7 over 3
square root of 9

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Find the domain of the following expression: 1/(√x)-2

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?