Since the simplified numerator, x > 0 for all x, we have f ''(x) > 0 ⇔ x2 − 1 > 0 ⇔ |x| > your answer cannot be understood or graded. more information and f ''(x) < 0 ⇔ |x| < . thus the curve is concave upward on the intervals (−[infinity], −1) and and con

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

What numbers are included in the set of integers? what numbers are not included?

Which sums are equal to 1hold 6/8? choose all answers that are correcta.1/8+6/8b.12/8+2/8c.8/8+1/8 +1/8+1/8+1/8+1/8+1/8d.8/8+6/8