.If there are 1024 relations from a set A={1,2,3,4,5} to a setB, then the number of elements in b is? pls it is urgent!

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) .

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Divide. write in the simplest form. 4 1/6 divided by 10