Find the perimeter of the window

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?

With: label the vertices and all the elements needed. find x

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74