If f(x)=\sqrt{\frac{1}{2}x-10}+3, which inequality can be used to find the domain of f(x)?

Me find the measure to side a and the process to solve the problem you appreciate it : )

Can somebody me out with this question

Which of the following pairs of functions are inverses of each other? o a. f(x)=x72+8 and 96-9 = 7/x+2) =8 o b. f(x)= 6(x - 2)+3 and g(x) - *#2-3 o c. $4) = 5(2)-3 and 90- 4*: 73 o d. f(x) = 6)-12 and 910 – +12