Answer:
1. 39
2. Not sure?
3. 81
Explanation:
#3: 81
I haven't done this type of math in a while so I'm unsure about #1 and #2, but #3 is 81.
3^4 = 3 × 3 × 3 × 3
3^4 = 9 × 3 × 3
3^4 = 27 × 3
3^4 = 81
5.7m questions
7.5m answers