How do you compose two functions?

Why do you use molten NaCl in electrolysis instead of an aqueous solution of NaCl? What ratio would you expect in a two factor cross if both parents are heterozygous? Aldosterone acts on what part of the kidney? How many feet does a quart of paint cover? What is the electronic geometry of NO3? Is glucose highly volatile? What is the name of a magnetized needle that swings freely? If a brown-eyed mother and a blue-eyed father have four children three will probably have brown eyes. What can you conclude from this? Where can you get info on Johannes Keppler? Why do short flights - like from London to Ireland - fly at the same altitude and speed as long distance flights - like from Europe to South Africa? Why can we feel earthquakes hundreds of miles away? How long do sea urchins live? Is mercury a semiconductor? What is the native word form thunderstorm? Will natural gas stove light if set up for propane? Convert White Rodgers 36C valve from LP to Natural? How do you power a clock with a fruit or vegetable? Why do some telescopes that collect electromagnetic radiation in the shorter wavelengths need to be placed either in dry areas or outside the atmosphere? What is at 31N and 71W? What can a deficiency of growth hormone during bone formation cause?