Math
posted by Sue .
6. Columbus' ships covered approximately 144 miles a day. How many miles would they have traveled in nine days? What was the average speed per hour? If there were two days when the weather did not permit movement, how many miles a day would they have to travel to make up the time if they needed to cover the same amount of miles? Under these conditions, what would the average speed per hour be?
In nine days they would have traveled 1296 miles
Average speed per hour = 144 dived by 24 which gives you 6 miles per hour
The third part I don't understand

They would have to go 1296 miles in 7 days.
1296/7 miles/day
1296 / (7*24)miles/hour