Something that could be done is to tie a rope long enough to cross the river and send the two younger brothers across first, then have Mike pull the boat back across the river with the rope and him get in the boat and row it across the river with just himself and the gear.
Another option is you can unload some gear, put the boys in the boat, row them across the river, unload the two younger boys, go back for the rest of gear and load it into the boat then come back.
Hope this helps!
Answer:
Distance between Gas Station and House = 7.81 miles.
Step-by-step explanation:
Given: House location ( 4, 3 ) and Gas station location ( 10, 8)
On graph 1 unit = 1 mile.
To find: Distance between Gas Station and House
We use the Distance formula to find the distance between two points 

From given points and formula,

= 
= 
=
units
Since, 1 unit = 1 mile
⇒ 
Therefore, Distance between Gas Station and House = 7.81 miles.
12,800
cause the hundreths place is at the 7
and the number is 781
if its 50 or over you round up 81 is over so youll make it 800
11 the greatest common number between 5,11