Help me please with this question

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great