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April 19, 2015

April 19, 2015

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

b)When will worldwide mobile ad spending reach $41 billion?

- algebra -
**Henry**, Sunday, December 11, 2011 at 4:51pmF(x) = Y = 0.4x^2 + 0.01x + 0.9 = 41 B.

Y = 0.4x^2 + 0.01x + 0.9 -41 = 0,

Y = 0.4x^2 + 0.01x - 40.1 = 0,

Use Quadratic Formula to find.

X = 10 Years after 2005 = 2015.

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