Luis Nunez begins walking at a rate of 4mph. Thirty minutes after he leaves, his wife, Kristin, realizes that Luis has forgotten his wallet, Kristin gets on her bicycle and begins riding at a rate of 24 mph along the same path that Luis took.
a) How long will it take for Kristin to catch Luis?
b) How far from their house will Kristin catch Luis?
a) How long will it take for Kristin to catch Luis?

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?

Find the solution of this system of equations -7x+y=-20 9x-3y=36

Allen wants to buy a hover board that sells for $249.99 and a helmet that is $36.54. how much change will allen receive if he gives the cashier three $100.00 bills?