The answer is 4.1
If the number is below 5, you round down, if it's 5 or above, you round up.
Rounded to 1 decimal place
10 because 7x9 which is the closest you can get to 66 is 7x9 which is 63 and those 3 extra people need a tour too so thats another one
Let 
be the length of a leg. Using the pythagorean theorem, the hypotenuse is
So, the hypotenuse is 
times as long as either leg.
