I’m pretty sure it is 66 since the base would be congruent to the top so plug in 7 into 10u-4 and u get 66!! (You plug in 7 since u=7)
| \
3ft | \
|_ _\
4ft
a²+b²=c² Pythagorean Theorem
3²+4²=c² simplify
c=√(3²+4²) isolate c
c=5
c*6=answer because you need wire for 6 trees
5*6=answer
answer=30
You will need 30 feet of wire
its terminating because as you can see there isn't any numbers that are ongoing
I would say that the option you have selected in the image is the only one that is correct because it is the only one that uses a similar sign, ~, rather that a congruent symbol.