What is the result of multiplying 2.5 by 3.51 in the correct amount of significant figures

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

If you had to research a particular disease or area of concern in veterinary medicine and science, which one would you choose? why?