Please help me with my work

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?

For the inequality |c| < |d| to be true, which of the following must be true?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8