Abusiness purchases a computer system for $3000. if the value of the system decreases at a rate of 15% per year, how much is the computer worth after 4 years?

The computer is worth $1,200 after four years.
Initial price- (Initial price x Rate of decrease x amount of years), so...
3,000-(3,000x0.15x4)=3,000-1,800=1,200
Hope this helps
P.S. the 0.15 comes from 15%. With percentages you move the decimal point twice to the left so 15.0 twice to the left is 0.15 as 3.0 is 0.03

You didn’t put the necessary image to solve the question : p