Tyler’s mom purchased a savings bond for tyler. the value of the savings increase by 4% each year. one year after purchased , the value of the savings bond was 156. find the value of the bond when tyler moms purchased. explain your reasoning !

When only separate discreet points are graphed it is called?

With finding limits of multi variable !

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.