Aplant nursery is growing a tree that is 3 ft tall and grows at an average rate of 1 ft per year. another tree at the nursery is 4 ft tall and grows at an average rate of 0.5 per year. after how many years will the trees be the same height?

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