During the morning rush customers arrive every 2 minutes on average at the kenchele’s local coffee (klc). three customers are served every 5 minutes on average. a. how likely is it that a customer arrives at klc in the morning rush and must wait in line? b. how likely is it that a customer arrives at klc in the morning rush and must wait in line behind exactly 2 others?

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

21, i'm pretty sure it's right lol