Answer:
a = 2
Step-by-step explanation:
Given the expression:
[tex]2111_{four} = 150[/tex]
This can be expressed as:
[tex](2*4^3)+(1*4^2)+(1*4^1)+(a*4^0) = 150\\128+16+4+a = 180\\148 + a = 150\\a = 150 - 148\\a = 2[/tex]
Hence the value of a is 2
