A: which expression shows how many ways 13 different beads can be arranged on a necklace with no clasp? b: evaluate the expression you chose in part a. select one answer choice for part a, and select one answer choice for part b. a: 13! a: (13−1)! b: 8.72×1010 b: 2.4×108 b: 4.79×108 b: 6.23×109 a: (13−1)! 2 a: (13+1)!