Question

You can model the population of a certain city between the years 1955 and 1955 by the radical function:

 

P (x) = 3 sqrt x-1940

 

 

Using this model, in what year was the population of that city 290,000?

 

 

 

 

	A. 1986
	B. 1988
	C. 1992
	D. 1982

 

Answer 1

Given that population of a certain city is given by radical function

p(x) = 3 sqrt x - 1940

To find which year the population will be 290,000

p(x) = 290,000

3 sqrt x - 1940 = 290,000

3 sqrt x = 290,000 + 1940

3 sqrt x = 291,940

sqrt x = 291,940 /3

sqrt x = 97313.33

x = (97313.33)^2

x = 9469884779.5689