Question 151419
how do i find the percentage of a normal curve 
You need a "z-chart" which is a chart that lists the percentages of
area under the curve over an interval of the horazontal axis under
the curve.  Use Google to see such a chart.
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what is the percentage of the area under the normal curve lies
a) to the right of u?
u is the center of the horizontal axis
Ans: 50% of the area lies to the right of "u".
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b)between u-2o and u + 2o?
Ans: Approximately 0.95 of area lies over the interval u-2o and u+2o
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c)to the right of u + 3o?
Ans: Approximately 0.0013 of the area lie over the interval u+3o to u+100o
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Cheers,
Stan H.