What is Log Base 4 of 20?

The below is the work with steps to find what is log base 4 of 20 shows how the input values are being used in the log base 4 functions. Formula:
log_b(x) = y, if b^y = x

Input:
x = 20
b = 4

Solution:
y = log₄ 20
= log(4 x 5)
= log₄(4) + log₄(5)
= 1 + 1.161
= 2.161
log₄(20) = 2.161