What is the domain of the function f(x) = 4x − 16? all real numbers

If u give wrong answer ill report u : )

At which value in the domain does f(x) =0?

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.