Example 0.3.5.

1. Find the cardinality of \(A = \{23, 24, \ldots, 37, 38\}\text{.}\)

2. Find the cardinality of \(B = \{1, \{2, 3, 4\}, \emptyset\}\text{.}\)

3. If \(C = \{1,2,3\}\text{,}\) what is the cardinality of \(\pow(C)\text{?}\)