A wątch purchased in 2003 for $5,680 was worth $5,260 in 2005. Assume the watch depreciated using linear model with t representing the years since 2003. (a) The linear depreciation function for the watch is D() = Number t+Number (b) How much was the worth in 2010? $ Number (c) When will the watch be worth $4,000? After Number years.

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