A baseball card sold for $259 in 1980 and was sold again in 1988 for $496. Assume that the growth in the value V of the collector's item was exponential. ..... a) Find the value k of the exponential growth rate. Assume V. = 259. k = 0.081 (Round to the nearest thousandth.) b) Find the exponential growth function in terms of t, where t is the number of years since 1980. V(t) =