SOLUTION: Hello helper, this is a square root equation with 2 parts. Thanks for the help. Suppose that N=sqrt(x+4)models the number of cases of an infection, in millions, of a disease x

Algebra ->  Square-cubic-other-roots -> SOLUTION: Hello helper, this is a square root equation with 2 parts. Thanks for the help. Suppose that N=sqrt(x+4)models the number of cases of an infection, in millions, of a disease x       Log On


   

Question 190458: Hello helper, this is a square root equation with 2 parts. Thanks for the help.
Suppose that N=sqrt(x+4)models the number of cases of an infection, in millions, of a disease x years from now.
1.Approximately how many cases of the infection will there be 16 years from now?
2.In approximately how many years will there be 6 million cases?
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
Given N+=+sqrt%28x%2B4%29
1.Approximately how many cases of the infection will there be 16 years from now?
N+=+sqrt+%2816%2B4%29
N+=+sqrt%2820%29
N+=+4.47 millions

2.In approximately how many years will there be 6 million cases?
6+=+sqrt%28x%2B4%29 square both sides to eliminate the radical
36+=+x%2B4
32+=+x