Possibly A)249.6
Explanation
Answer:

Step-by-step explanation:
From the question we are told that:
Fan oscillates 
Distance 
Since

Generally the equation for the area A is mathematically given by


Where






Therefore the area A is given as



Answer: The population would be 6580 after 7 years.
Step-by-step explanation:
The growth rate is exponential. We would apply the formula for exponential growth which is expressed as
y = b(1 + r)^ t
Where
y represents the population after t years.
t represents the number of years.
b represents the initial population.
r represents rate of growth.
From the information given,
b = 5000
r = 4% = 4/100 = 0.04
t = 7 years
Therefore
y = 5000(1 + 0.04)^7
y = 5000(1.04)^7
y = 6580
Answer:
Hope this helps you on your Assignment :<em>D</em>