After a special medicine is introduced into a petri dish full of bacteria, the number of bacteria remaining in the dish decreases rapidly . The relationship between the elapsed time in seconds, and the number of bacteria B(t) in the petri dish is modeled by the following function:

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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?

Ranck the following in order from least precise to most precise