Streaming Music Consumers are spending more on music from digital sources than they do on CDs. Purchases of streamed music from projected to grow in accordance with the model f(t) = 3.7 + 0.84 In(t + 1) (0 sts 5) where f(t) is measured in billions of dollars and t is measured in years, with t = 0 corresponding to 2012.t (a) What was the amount spent by consumers on streamed music in 2012? $ 3.7 billion What was the amount spent by consumers on streamed music in 2013? (Round your answer to one decimal place.) $ 4.3 billion (b) How fast was the amount spent by consumers on streamed music growing in 2013? (Round your answer to one decimal place.) %24 billion/year

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