Question 456318
1)s=9/sqrt(64)=9/8=1.125
m=750
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2) 
z=2/1.125=1.78
area under curve for +-1.78=.9250
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3)
1/1.125 = .89
area under curve for +-0.89=0.6266
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4)
For the area under the curve of 0.8 the z=+-1.28
1.28 * 9/8 = 1.44 ml
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5)
For the area under the curve of 0.95 the z=+-1.96
1.96 * 9/sqrt(x)=1 ml
sqrt(x)=1.96*9=17.64
x=311.17=312 always round up.
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Ed