Question

You can model the population of a certain city between 1955-2000 by the radical function P(x)=55,000 sqrt x-1945. Using this model, in which year was the population of that city 220,000

Answer 1

1961

Explanation:

Put the given information into the equation and solve for the unknown.

220,000 = 55,000√(x -1945)

4 = √(x -1945) . . . . divide by 55,000

16 = x -1945 . . . . . . square both sides

1961 = x . . . . . . . . . add 1945

The population was 220,000 in the year 1961.