Isabell is standing at the top of a waterslide that leads to a pool below. the angle of depression from top of the slide to the pool is 20.81°, and the slide is 53 feet long. how far is the top of the slide from the ground? round your answer to the nearest foot

19 feet
42 feet
50 feet
139 feet

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?