How many states in the United States have an active volcano?
12
1
1
2
1
2
1
3
2
1
3
5
2
1
3
5
2
7
1
4
3
5
2
7
1
4
3
5
2
7
1
4
3
5
2
7
1
4
3
5
2
7
1
4
3
5
2
7
6
1
4
3
5
2
7
6
1
4
3
8
5
2
7
6
1
4
3
8
13
5
2
9
7
6
1
4
3
8
13
5
2
9
7
6
1
4
3
8
13
5
2
9
7
6
1
4
3
8
13
5
2
9
7
6
1
4
3
8
13
10
5
2
9
7
6
1
4
3
8
13
10
5
2
9
7
6
11
1
4
3
8
13
10
5
2
9
7
6
11
4
3
8
13
10
5
2
9
7
6
11
4
3
8
13
10
5
9
7
6
11
4
3
12
8
13
10
5
14
9
7
6
11
4
12
8
13
10
5
14
9
7
6
11
4
12
8
13
10
14
9
7
6
11
4
12
8
13
10
14
9
6