around 43 hours
A flight from Frankfurt to SF (Assuming SF is San Francisco) would take about 12 hours.
it would take approximately 10 hours
42 hours
about an hour
Approximately 10 to 11.5 hrs, non stop, depending on where you depart in California (LA vs SF for example)
The time difference between New York and California is 3 hours.
It's 21 miles, but it can take an hour.
The answer will depend on how many tilers can work on it, and how fast they work.
10 second.
5 hours
8-10 hours
There is no such thing as a nearest significant figure. For sf (as with decimal places) it is necessary to specify how many. 0.00747 to 1 sf is 0.007, to 2 sf it is 0.0075, to 3 sf it is 0.00747, to 4 sf it is 0.007470 and so on.