ya boi karl bought an elephant for $3567 he paid with $50 and $1 bills he used a total of 237 bills how many 1's and how many 50's did he use

Can you me find the missing length. i attached an image.

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

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.