Answer:
$172.80
Step-by-step explanation:
The phone cost $800
Decreases by 2/5 every year. So the cost would be 3/5 (instead of doing 800 - 800 *2/5 its easier to just do 800*3/5)
Here is a equation for this question:
[tex]800* (\frac{3}{5})^{t}[/tex]
t = time in years
So we can plug in 3 for t
[tex]800* (\frac{3}{5})^{3}[/tex]
[tex]800* (\frac{27}{125})[/tex]
[tex]172.8[/tex]
So the phone is now worth $172.80
Hope this helps! :)
