Answer: 2000
Step-by-step explanation:
From the information, we are informed that a population of 500 doubles in size every 80 years. Therefore, the population in 160 years will have doubled twice i.e 160/80 = 2 times
First time doubling = 500 × 2 = 1000
Second time doubling = 1000 × 2 = 2000
32
+72
104
104 divided by 2 is 52 start off there
That would be DF is congruent to DE ( first choice)
( they are both = sqrt(2^2 + 3^2)
The system is
i)

ii)

The solutions to this system, are all points (x, y) for which BOTH these 2 inequalities hold.
Check the points separately:
(5, 1)
i)

True
ii)

Not True
(0, 0)
i)

True
ii)

True
(-2, -3)
i)

True
ii)

True
(2, 5)
i)

Not True
ii)

Not True
Answer: (0, 0) and (-2, -3)