Saturday

April 19, 2014

April 19, 2014

Posted by **Miguel** on Thursday, March 24, 2011 at 11:29am.

- Math Help -
**Reiny**, Thursday, March 24, 2011 at 11:51amsolve 41 = .4x^2 + .01x + .9

multiply by 100

40x^2 + x + 90 = 4100

40x^2 + x - 4010 = 0

x = (-1 ± √641601)/80 = 10 or a negative

it will take 10 yrs

**Related Questions**

algebra - The amount spent worldwide in advertising on mobile devices can be ...

maths - In the year 2000 there were 350 mobile phones users living in the small ...

math - An advertising agency conducted a survey and found that the number of ...

math - An advertising agency conducted a survey and found that the number of ...

Algebra - An advertising agency conducted a survey and found that the number of ...

Algebra - An advertising agency conducted a survey and found that the number of ...

college algebra - An advertising agency conducted a survey and found that the ...

statistics - Webcredible, a UK-based consulting firm specializ- ing in websites...

algebra - An advertising agency conducted a survey and found that the number of ...

math, correction - The revenue for a sandwich shop is directly proportional to ...