Store e offers a book that karen wants for 20% off its regular price of $15. store f sells the same book for $15, before a $3 mail-in rebate. where should karen purchase the book? explain your reasoning. (be sure to consider the cost of postage, as well as the time and effort required to mail in the rebate to request in your response.)

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

When only separate discreet points are graphed it is called?