Three boys cut out hundredths decimal models. Fred does not shade any of his models. Edward shades nine tenths of one model. Jeff shades one model and seven tenths of another model. What decimal represents the amount each boy ​shades?

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your