The hypotenuse of a 45 -45 -90 triangle measures 24 inches. what is the length of the one leg of the triangle

Which statement is true about the function f(x)= square root -x ? the domain of the graph is all real numbers. the range of the graph is all real numbers. the domain of the graph is all real numbers less than or equal to 0. the range of the graph is all real numbers less than or equal to 0.