PLEASE HELP In a certain chemical, the ratio of zinc to copper is 4 to 15. A jar of the chemical contains
315 grams of copper. How many grams of zinc does it contain?

When you are making a circle graph by hand, how do you convert a number for a part into its corresponding angle measure in the circle graph? when you are making a circle graph by hand, what should you do if one of your angle measures is greater than 180°?

Mario is constructing a frame for 10 in. by 8 in. photo. he wants the frame to be the same with all the way around in the same area of the frame and photo to be 120 square inches what is the dimension of the frame?

How many 3/8s are in 6 plz someone tell me now