Need help on number 8 plz

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

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?

Find the distance between the pair of points a(-1,8) and b(-8,4)