Ok I’m confused on this one I don’t know which would be the 40th or 50th answer can someone help?

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?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual