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3 years ago

Help me on 9a please

Mathematics

1 answer:

frosja888 [35]3 years ago

6 0

Answer:

y = 21500 (.91)^t

Step-by-step explanation:

The equation for exponential growth (or decay) is

y =ab^x

where a is the initial value

and b = 1 - growth (or decay) rate

We know the initial value is 21500

and the decay rate is 9%

b = 1-.09

b = .91

y = 21500 (.91)^t

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