Answer:
1.307692
Step-by-step explanation:
1.31
I used a calculator and just rounded this number 1.30769230769
if the number is five or higher then you would round the number next to the 7. So 7 rounded 0 is 1.31. Sorry i tried to explain it in the best way possible!
I believe it is Option 1
Since the fourth root of 81 will be 3 and of 16 will be 2.
15.5
42.59 km
Total distance = 17.9 + 6.03 + 15.66 + 3 = 42.59