I didn't understand this !!!! what is ** ???

Answer 1

** is in python the operator for exponentiation.
3**2 = 9 = 3*3
2**5 = 2*2*2*2*2 = 32

Answer 2

it's mean (power to) as example :
2**3 = (2 to power 3) = 2*2*2 = 8

Answer 3

** power

Answer 4

5**2=5²=5x5=25
...enjoy.

Answer 5

**exponentiation

Answer 6

* is equal ×