Question 443690
 <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi

mean of 80 and a standard deviation of 4
*Note: {{{z = blue(x - mu)/blue(sigma)}}}  | x = 89
   z = (89-80)/4 = 9/4 = 2.25
{{{drawing(400,200,-5,5,-.5,1.5, graph(400,200,-5,5,-.5,1.5, exp(-x^2/2)), green(line( 2.25,0, 2.25,exp(-2.25^2/2))),locate(4.8,-.01,z),locate(4.8,.2,z))}}}