Which of the following numbers has 2 significant figures?

What minimum peak overpressure is required to turn over loaded rail cars?

A) 17 psi B) 7 psi C) 77 psi D) 0.7 psi

A man armed with a shotgun has taken two people hostage and has shot one of them. Upon arriving at the scene, you should:

A: inform the incident commander that you will assume responsibility for the entire incident since there is a confirmed patient. B: leave your lights and siren on because this will let the injured person know that you have arrived and are there to help. C: be sure and turn up your portable radio loud enough so that you can remain aware of the entire situation. D: have the incident commander guide you to a shielded staging area and wait for the tactical team to bring the patient to you.