Answer:

Step-by-step explanation:
From the question we are told that:
Population size 
Rate of Population increase 
Average annual income 
Rate of annual income increase 
Generally the equation for Total Income is mathematically given by



Answer:
x = 9
Step-by-step explanation:
You can solve this problem by isolating the variable.
3-√x = 0
√x = 3 (add √x to both sides of the equation)
x = 9 (square both sides of the equation)
Answer:
3 is the right one
Step-by-step explanation:
Simple math you know