Answer:
4.7 miles per day.
If number two is meaning to add 4.7(.5)= 2.3(3) plus the original 14 miles over a three day travel from number one. Then the total distance for the six day trip would be 14+ 2.3(3)= 20.9
If it is meaning a total of 6 days traveling at half the speed
4.7÷2= 2.3 2.3 × 6= 13.8 miles