So for this problem I tried using the standard deviation formula for population and sample but still no correct answer. Can someone help me out here please? Not sure what to do.

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Indicate the formula for the following conditions: p^c(n, r)=