Question 1127107
z=(x-mean)/sd
the mean will be 90 with 1,2,3 sd s to the left at right at 60,70,80 and 100,110,and 120
z for 95 is +0.5
z for 72 is -1.8
P(x>109) is probability z>1.9, which is 0.0287
this is z between -1.5 and 2, which is from the table or calculator 0.9104
There is a 91% chance that a score will be between 75 and 110 if picked randomly

z is +1.17
z*sd=11.7
the score would be 101.7 for the minimum