Reymonte went hiking last weekend. he started at an elevation of 49 feet below sea level, which can be thought of as an elevation of -49 feet. at the end of the hike, his elevation was 281 feet higher than where he started. what was his elevation relative to sea level, in feet, at the end of the hike?

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?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

Plz hurry evaluate the expression a+b where a=8 and b=19