At the band's peak of popularity , a signed black diamond poster sold for $500. three years later, the band was almost forgotten, and the poster was worth only $10. what is the annual rate of depreciation for the poster
a.) what the is annual rate of depreciation for the poster ?
b.) write a function that will allow to calculate how much the poster is worth after x years. state the meaning of each part of the equation in the context of the problem