Answer:
Step-by-step explanation:
f(x) = sqrt(x-4)
Domain is x>= 4 because when x<4, then x-4 becomes negative, and square of negative numbers is not in the real domain.
f(10) = sqrt(10-4) = sqrt(6) = 2.45
f(6) = sqrt(6-4) = sqrt(2) = 1.41
f(12) =sqrt(12-4) = sqrt(8) = 2.28
f(19) = sqrt(19-4) = sqrt(15) = 3.87
