Modeling the population of a city betwwen the years 1965 and 1995 by radical function P9x)=75,000 * cubed root of x-1940. using this model, in what year was the population of that city 245,000? Possible answers are : 1973, 1975, 1979, 1970

Question

Modeling the population of a city betwwen the years 1965 and 1995 by radical function P9x)=75,000 * cubed root of x-1940.  using this model, in what year was the population of that city 245,000?  Possible answers are :  1973, 1975,  1979, 1970

campbell_st · Answer

well you will have to set up the equation 

$$245000 = 75000 \times \sqrt[3]{x - 1940}$$

the steps are 

1. divide both sides by 75000

2. cube both sides

3. add 1940 to both sides

anonymous · Answer

am working it out