Element X decays radioactively with a half life of 12 minutes. If there are 200 grams
of Element X, how long, to the nearest tenth of a minute, would it take the element to
decay to 50 grams?

y= a(.5) +

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?