6xto the -1st power times y to the fifth power times 4x to the -4th power times y to the -2nd power

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.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

Factor the polynomial. b^2 + 4b + 4