A boat traveled 15 km downstream and 15 km back upstream. The downstream trip took 36 minutes. The trip back took 1 hour. What is the speed of the boat in still water? What is the speed of the current?

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?

Me d is also an option but i couldn't get it in the picture

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis