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weeeeeb [17]
3 years ago
12

In a village, the cases of a particular infectious disease have been exponentially decreasing at a rate of 80% per year since th

e people started receiving the vaccine. If there were 200 cases in the village to start with, predict the number of cases after 2 years.
Mathematics
1 answer:
adoni [48]3 years ago
4 0

Answer:

8

Step-by-step explanation:

Exponential decay is expressed by an equation of the form:

A = P(1 - r)^t

where P = initial value, r = annual rate of decay, t = time in years

A = 200(1 - 0.80)^2

A = 8

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