Harriet bought 4 boxes that each have 30 bags of chips. she already had 80 bags of chips. if she then sells 200 bags of chips, how many bags of chips does she have left?

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.