Answer: people in the US will spend____ billion dollars on statins in 2016

Answer:
38.5
Step-by-step explanation:
The equation says
S - 1.8x = 6.1, where x is the amount of years after 1998.
2016 is 18 years after 1998.
S - 1.8*18 = 6.1
S= 32.4 + 6.1
S= 38.5