Emergency! nicole sells candy bars at a tailgate party to raise money for her school sports club. she bought them at 4 for $1, and sold them at 2 for $1. how many candy bars must be sold in order to raise $5?

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

If you could answer these your a life saver