There are fifteen girls
and three boys in a
dance class. If a leader
is chosen at random,
what is the probability
a boy is chosen?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

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?

What is the angle measure, or angle of depression, between this bird and the bird watcher?