Which pair of numbers is relatively prime?

a.
26 and 91

b.
14 and 63

c.
18 and 45

d.
10 and 33

Find the power series expantion of f(z)=log(4=3z) at the point z=-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?

Need plz been trying to do it for a long time and still haven’t succeeded