Michael has 4 red shirts, 3 green shirts, and 5 blue shirts in his closet. if he randomly selects a shirt what is the probability that he chooses blue or red?
a)1/2
b)1/4
c)3/4
d)5/12

Explain how you can use the associative property to evaluate (7x50)x4.

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?