Question 1169717
sd=sqrt(115)=10.72 ml
the half-interval for 99%CI is z*sigma/sqrt(n)=2.576*10.72/sqrt(61)=3.54
therefore the mean is 188.20-3.54 or 184.66 ml

to be within 1 ml (not sure what the 2 means there); 115 ml^2 are appropriate units for variance, but ml is appropriate for the answer.
1.96*10.72/sqrt(n)=1; sqrt (n)=21.0112, n=441.47 or 442

sample size is 442.