Why is it important for a researcher to know all safety procedures and where all safety equipment is stored even if they never have an accident?

It is important because they never know. Anything can happen at anytime or any place so being prepared is always good. :)

It's important for a researcher to know all safety procedures and where all safety equipment is stored even if they never have an accident because this information could save your life.  Even if you've never made a mistake or had an accident there's always that chance that you mess up and something bad happens and if you didn't know the safety procedures or where safety equipment is it could cost you your life and possibly the lives of others.

27. =3,500,000 x 4,000 = 14,000,000,000

Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f.