What type of number is 12i+360

Which segments are congruent? o jn and ln o jn and nm o in and nk onk and nm

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 is r i 4.5+10r=-6.5 with work pls