(a) Which type of water has more dispersion in pH using the range as the measure of dispersion?
(b) Which type of water has more dispersion in pH using the
standard deviation as the measure of dispersion?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?