a cylinderical pipe is 28m long . its internal radius is 3.5cm and external radius is 5cm . calculate the volume in cm^3, the metal used in making the pipe . the volume of water in litre that the pipe can hold when full correct to 1 decimal place​

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.