import math
import numpy as np

# Suppose Kendra Gallegos has appointments with 8 potential customers. 
# Kendra will be ecstatic if all 8 of these potential customers decide to make a purchase from her. 
# Of​ course, in sales there are no guarantees. 
# 
# How many different sets of customers may place an order with​ Kendra? ​
# (​Hint: Each set of customers is a subset of the original set of 8 ​customers.)

n = 8

2 ** n