Answer:
$4500
Step-by-step explanation:
Given: Purchase cost of Van= $40000
Estimated useful life= 8 years
residual value= $4000
As given we have to use straight line method for finding depreciation expense;
Formula, Depreciation expense=

Annual depreciation expense=

∴ Depreciation expense=

We know that in straight line method of depreciation, depreciation expense will remain same for all useful life of asset, however, book value changes.
∴ Depreciation expense for second year will also be $4500.