Final answer:
The computer will be worth $819.20 four years from now.
Step-by-step explanation:
To find out how much the computer will be worth in four years, we need to calculate the value after each year of leasing. The average lease is 20% of the value each year, so we can calculate the value after each year as follows:
- Year 1: $2000 - 20%*$2000 = $1600
- Year 2: $1600 - 20%*$1600 = $1280
- Year 3: $1280 - 20%*$1280 = $1024
- Year 4: $1024 - 20%*$1024 = $819.20
Therefore, the computer will be worth $819.20 four years from now.