Need help on numbers 6, 7, and 8 ill mark brainliest if they are right

please explain how you got the answers if you can

In the diagram below what is the approximate length of the minor arc ab

Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)

What is not true about kl and mn? what is mn? (show your work)