Respuesta :

You can represent that value of the phone as

()=750(.72)
V
(
t
)
=
750
(
.72
)
t

where
t
is in years at

(0)=750
V
(
0
)
=
750

(1)=750∗.72=540
V
(
1
)
=
750

.72
=
540

(2)=750∗(.72)2=388.8
pemdas 28x750 eat eat eat