The front end estimate is 40. But estimating a single number, in isolation and without context, is a complete waste of time. It all comes down to the context of what needs to be done with the number.
If I had to add 43 to 1 trillion, I would estimate it as 0.
If I had to add 43 to 0.0000000001, I would use the number as given. If I had to divide it by 4, I would estimate it as 44 because 44/4 = 11. If I had to divide it by 3, I would estimate it as 42 because 42/3 = 14.
Round each of the numbers then add the rounded numbers. 60+40=100.
Estimated Time: 1 hour 43 minutes Estimated Distance: 85.50 miles
Estimated Time: 23 hours 43 minutes Estimated Distance: 1433.60 miles
They are 2980 miles away. The estimated time of travel is 43 hours.
Estimated Time: 4.0 hours 43 minutes Total Estimated Distance: 287.24 miles
It is an estimated drive by MapQuest of 43 hours and 49 minutes.
It is 461.80 and 6 hours and 43 minutes of estimated driving.
MapQuest gives the estimated driving time as 43 hours and 16 minutes.
MapQuest gives the estimated driving time as 4 hours and 43 minutes.
MapQuest gives the estimated driving time as 9 hours and 43 minutes.
MapQuest gives the estimated driving time as 9 hours and 43 minutes.
It is 645.43 miles and an estimated 10 hours and 43 minutes according to MapQuest.