Question

34 meters/seconds = _____ mm/hour
I know 1 m is 1000 mm and 60 seconds is 1 hour. So I got 2040000.
Would the answer in scietnific notation and significant figures be 2.0 x 10^6 mm/hour?

Answer 1

Yes.

34m/s
= 34m/s * 1000mm/m * 60s/hr
= 2040000mm/hr
≈ 2.0×10^6mm/hr

Answer 2

I don't agree with either. Both left out a factor of 60 to convert min to hr.
2.04E6 is really mm/min. To convert to mm/hr use
2.04E6mm/min*60 min/hr = 1.2E8 mm/hr