Marilyn collects old dolls. She purchases a doll for $450. Research shows the doll's value with increase by 2.5% each year.
1 answer:
Answer:

Step-by-step explanation:
we know that
The equation of a exponential growth function is given by

where
y is the value of the doll
x is the number of years
a is the initial value
r is the rate of change
we have

substitute


What will be the value of the doll in 20 years?
For x=20 years
substitute in the equation

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