Exponential growth word problem
A coin sold for ?$\$ 269$ in 1980 and was sold again in 1989 for $\$ 477$. 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 $V_0$ equals=269.
b) Find the exponential growth function in terms of? t, where t is the number of years since 1980. ?
c) Estimate the value of the coin in 2013. ?
d) What is the doubling time for the value of the coin to the nearest tenth of a? year?
?e) Find the amount of time after which the value of the coin will be $ \$ 2878$.
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