how many sides does a polygon have if the sum of its interior angles are a) 1080 b) 1260 How could i figure this out without being able to know how many sides the polygon has?
about 99% of the mass of the human body is made up of just six elements. oxygen:65% carbon18% hydrogen:10% calcium:1.5% phosphorus:1.0% Find the mass of each element in a human body iwth mass 60kg. could you please explain to me how to do this? your help is appreciated.:)