Please explain how you get the answer if you do answer

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?

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Use the drop-down menus to complete the statements to match the information shown by the graph.