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Answer:
D
Step-by-step explanation:
A) a=the initial value ($1650)
b=1-percent of decrease (0.81 or 81%)
B) About 3 years
I would say 504 basing it off of converting 2/3 into 4/6 and used sets of 84 to each be 1/6
To find the mean, you have to add all the numbers then divide it by how many numbers there are.
In this case, you'll need to add all those numbers and divide it by 4.

The mean is 1995.