889,531 rounded to the nearest 10 thousand

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?

Is the point (0, 8) on the x-axis or y-axis? how do you know?

How many ordered pairs of positive integers satisfy xy=32?