I believe the answer is 40. this is because if 30 people all know each other and hug and there are 10 people who don't know anyone and handshake, that means that since those 10 people know no one, then they also shake hands with the other 30 who do know each other. Im not sure if this is right but I hope it helps!
Triangle angles add to 180 degrees.
x = 180 - 70 - 30 = 80
Answer: 80 degrees
This is an exponential function.
The starting population is: 10,000 and it doubles every 14 years.
In 42 years ( 42 : 14 = 3 ) the population doubles 3 times.
The equation ( exponential ) is :
y = 10,000 * 2^n
In this case: n = 3
y = 10,000 * 2 ^3 = 10,000 * 8 = 80,000
Answer: In 42 years the population of this town will be 80,000.
