Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of illness such as gout, leukemia,...

(d) Find the sample size necessary for a 95% confidence level with maximal error of estimate E = 1.10 for the mean concentration of uric acid in this patient's blood. (Round your answer up to the nearest whole number.) _____________ blood tests

I cannot seem to get the correct answer for B. Can someone please help me?