Mandy lives in los angeles todd in boston. they plan to meet in st louis which is 1825 mile from los angeles and 1192 from boston. mandy takes train at constant speed of 80 mph todd drives car at constant speed 55 mph. who reaches st louis first

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.

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air