Aperson puts $22 into a bank account on january 1, $27 on february 1, $32 on march 1, and so forth. how much has the person put into tge bank account by december 30?

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?

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.