A sprinter ran the 400 meter dash in 44.62 seconds. Convert her speed into miles per hour

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 square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3