not understand "exponentiation"plz introduce me.

Answer 1

In Python, two asterisks like this: ** is the exponent operation. The first number is then the base, and the number appearing after the ** is the power to which that base is raised. (How many times it is multiplied by itself.)
For ex.

a = 2**3
ans a=8 becoz 2**3 means 2^3= 8 ie 2*2*2=8

another exp:

b = 3**2
ans b=9 --> 3^2 -->3*3=9

c= 3**3 --> 3*3*3=27

hope you will understand.

Answer 2

really you need to figure out what this is there is a comprehensive way that you can visit khan acadeny which is a good learning station

Answer 3

2^5=32

Answer 4

√9=3

Answer 5

thanks dear Bruce..