I need help with this question please. Just do the first one that starts with the square root, ignore what’s below the options

What is the smallest integer n such that n\sqrt{2} is greater than 20

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.

Which of the following circles have their centers on the x-axis? check all that apply.