Need help answering these 3 questions 12) Why astronomers need astronomical units? 13) There are 2.54 centimeter or 0.0254 meter in 1 inch. How many

Need help answering these 3 questions12) Why astronomers need astronomical units?13) There are 2.54 centimeter or 0.0254 meter in 1 inch. How many meters in 300 inches?How many centimeters? (Label how some units cancel each other as we did in theexample above.)14) In August 2003, Mars made its closest approach to Earth for the next 50,000 years.At that time, it was only about .373 AU away from Earth. How many km is it?

Need help answering these 3 questions12) Why astronomers need astronomical units? Because the inch, foot, meter, kilometer, and mile are all too small, and the light year is too big.All of those...