Rank the vector combinations (all additions) on the basis of their magnitude. rank from largest to smallest. to rank items as equivalent, overlap them. note that in some browsers the plus sign between vectors may not be clearly visible. if there are two vectors, then there is a plus sign between them

measure their densities same density, same sub

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.