At the same time, sam and fred who are 168 miles apart begin moving toward each other. find the number of hours before they meet if sam runs 12 mph and fred runs 9 mph.

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.