The box-and-whisker plot below represents some data set. What percentage of the data values are between 69 and 72?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)