The first question 1. x= 4 2.= -8
The second question 1.x= -8 2. X= 2
for all positive integers (like n = 1, 2 or 5) the conjecture holds true but not for negative values like if n = -3 then the result will not become positive, because:

which is not positive.
I don't know the correct ans but it could be new delhi
The angle is 60° because it is one of three angles that make up an equilateral triangle.
Hope this helps! :)
Answer: 4,560 feet
Step-by-step explanation: because 60 seconds in a minute so 72× 60 = 4,560