E. adobe ruins because the adobe is a native american tribe. a cultural landscape is an area of geographic land that has cultural impact. the other answers are simply environments.
Most likely federal, as monarchy isn't a strong central government, it's a one person government with optional advisors. A federal government implies a democratic style of leadership with a main government instead of separate small ones within a country.
Answer: f(x) = 18000(0.80^x)
Explanation:
The initial value is 18,000 because that is the value of the car when it was purchased. The equation can be derived by plugging these values into the formula for exponential growth: f(x) = a(1 + r)^x. This gives us f(x) = 18000(1 - 0.20)^x or f(x) = 18000(0.80^x).