The mass of a science textbook is 1.15 kilograms. The mass of a history textbook is 950 grams. Rami makes a stack of 4 science textbooks and a stack of 5 history textbooks. Which stack has a greater mass, and by how much?

The price of a particular stock is represented by the linear equation , where x represents the number of weeks the stock has been owned and y represents the price of the stock, in dollars. if this relationship continues, what is the price of the stock after it has been owned for 12 weeks? $92.55 $94.37 $100.52 $114.39

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?

What number is 7 units left of -15?