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September 18, 2014

Homework Help: algebra

Posted by pat solon on Friday, December 9, 2011 at 2:30pm.

The amount spent worldwide in advertising on mobile devices can be estimated by f(x) = 0.4x2 + 0.01x + 0.9, where x is the number of years after 2005 and f(x) is in billions of dollars.
b)When will worldwide mobile ad spending reach $41 billion?

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