7 4/5 = 7 36/45
8 8/9 = 8 40/45
+----------
15 75/45
15 75/45 = 16 30/45
Hi,
The correct order should be -4.5, -3.9, -√2, -(5/25), 2/3
Answer:

Step-by-step explanation:
Distance for one way = 14 miles
The boat goes an average speed of 20 mph
The train goes 10 mph faster than the boat.
Speed of train = 20+10 = 30 kmph
Abdul takes the train into the park and the boat on his way back.
Time taken for going into park by train = 
= 
Time taken for going back by boat = 
= 
So, total time = 
Hence the round trip take 