One.
One.
They have three significant digits
3.15576x1016 seconds (cannot get more significant figures on my calculator)
The answer kind of depends on what "this problem" is!
It took 7380/3600 = 2.05 hours
2,592,000 seconds.
One day is equal to 60 x 60 x 24 = 86400 seconds. Therefore, rounded to three significant figures, 599 seconds is equal to 599/86400 = 0.00693 days.
A computer can be used to performed large calculations and run different kinds of simulations. A computer can also be used for entertainment and to create artwork. While a human could use days on a calculation, a computer can do it in a matter of seconds.
15 seconds
60 seconds = 1 minute60 minutes = 1 hour→ 7380 second = 7380 ÷ 60 minutes = 123 minutes = 123 ÷ 60 hours = 2 1/20 hours = 2.05 hours
Speed = distance / time = 55 / 28 = 1.96 m/s (correct to 3 significant figures)