Plz hurry.. jeremy buys moving boxes for his dad's company. his dad told him to buy a total of 288 boxes and to buy 5 medium boxes for every 7 large boxes. how many of each size box should he buy?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?