Can u please help me with this

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

Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2

Identify the number as a rational or irrational. explain. 127