Diseases tend to spread according to the exponential growth model. In the early days of AIDS, the growth multiplier (i.e. common ratio) was around 2.0. In 1983, about 1800 people in the U.S. died of AIDS. We can use the exponential model:
P
n
=
1800

(
2.0
n
)
.
If the trend had continued unchecked, how many people would have died from AIDS in 2004?