Five hundred eighty students are buying their lunches in the school cafeteria today. this is 80% of all the students in school today. how many students are in school today

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 ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?