Can someone help me with this question?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

Pls what is the decimal equivalent of 5 over 9? select one: a. 0 point 5 bar over top of 5 b. 0 point 6 bar over top of 6 c. 0 point 8 bar over top of 8 d. 0 point 9 bar over top of 9