answer : V(t) =40,000- 5000t
explanation:
Depreciation
Depreciation is an annual and systematic reduction in the value of a fixed or capital asset following the assumption of matching which says the revenue should be matched with the expense incurred to earn that.
Value of asset at any point of time = cost - accumulated depreciation till that time
Cost = $40,000
Accumulated depreciation = sum of depreciation charged so far, since the depreciation is constant on annual basis it = 5000t for t years