Mobile-phone ad spending mobile-phone ad spending is


Question: MOBILE-PHONE AD SPENDING Mobile-phone ad spending is expected to grow at the rate of

R(t) = 0.8256t-0.04   (1 ≤ t ≤ 5) 

Billion dollars/year between 2007 (t = 1) and 2011 (t = 5). The mobile-phone ad spending in 2007 was $0.9 billion.

a. Find an expression giving the mobile-phone ad spending in year t.

b. If the trend continued, what will be the mobile-phone ad spending in 2012?

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Mathematics: Mobile-phone ad spending mobile-phone ad spending is
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