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?