On a riding lawn mower how long does it take to cut 5 acres

real, smaller and upside-down.   so the answer should be b.

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.