Isaac draws a regular octagon and rotates it about its center. which angle measures can isaac rotate the regular octagon through to map it onto itself? select each correct answer. 30° 45° 90° 120° 135° 180°

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

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?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?