Second grade > F.11 Subtraction word problems - up to 18 2FD Learn with an example () There were a total of 10 books on the shelf. Then 1 book was taken away. How many books are left? books Submit
Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?