What is the expanded form for 309,603,114

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m