Round seven point seven six to one decimal place

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

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 $s$?

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school