In the figure above, xyz is equilateral, with side of length. if wy is a diameter of the circle with center o, then the area of the circle is
(a) √3π/4
(b) 2π/3
(c) 3π/4
(d) π
(e) 3π/2

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236