1.Write a equation in factored form, y=a(x-r)(x-s) for the 2 parabolas. 1a)The zeros are (5,0) and (9,0) and the minimum value is -2.

1b)The X intercepts are (-6,0) and (2,0) and the Y intercept is -9.

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?