Triangle ABC was rotated about the origin. Which rule describes the rotation?

A) Ro,90°
B) Ro,180°
C) Ro,270°
D) Ro,360°

The R stands for "rotation". The "O" as a small subscript means "origin" which is where the x and y axis cross. The 90 degrees means we rotate 90 degrees counterclockwise. This is equivalent to 270 degrees clockwise, but writing is not correct as we don't rotate 270 degrees counterclockwise.

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

answer: -8.2562234e+13