What is Log Base 10 of 90?

The below is the work with steps to find what is log base 10 of 90 shows how the input values are being used in the log base 10 functions. Formula:
log_b(x) = y, if b^y = x

Input:
x = 90
b = 10

Solution:
y = log₁₀ 90
= log(10 x 3 x 3)
= log₁₀(10) + log₁₀(3) + log₁₀(3)
= 1 + 0.4771 + 0.4771
= 1.9542
log₁₀(90) = 1.9542