How to find two consecutive numbers whose squares differ by 27?

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

Write the equation in logarithmic form e^x=403.429

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?