How long will it take 50 grams of a substance to decay to 10 grams, if the rate of decay is k = -0.345 ? Round to the nearest tenth.

Anthony is making a collage for his art class my picking shapes randomly. he has five squares, two triangles, two ovals, and four circles. find p( circle is chosen first)

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter

Need so much on this one how many yards?