Which of these ratios are equivalent? 4/6, 10/25 and 6/15

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?

Over the course of a month, a person's weight decreases. what type of relationship is this? a. positive relationship

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25