If 4 × 5^x = 500, then the value of x^x is

10

If 4^x = 8³, then the value of x is

10

If then the value of (20)^2x is

11

If (27)^x = (81)^y, then let us write x : y.

11

If (5⁵ + 0.01)² – (5⁵ –0.01)² = 5^x, then let us calculate the value of x and write it.