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ELEN [110]
3 years ago
12

Solve the problem of exponential growth. In 1985 an antique automobile club had 23,000 members. Since then its membership has gr

own at an average rate of 5% per year. Assuming this trend continues, how many members will there be in 2020? Round to the nearest thousand.
Mathematics
1 answer:
12345 [234]3 years ago
5 0

Answer:

127,000\ members

Step-by-step explanation:

In this problem we have an exponential function of the form

f(x)=a(b)^{x}

where

a is the initial value

b is the base

The base is equal to

b=1+r

r is the average rate

In this problem we have

a=23,000 members

r=5%=5/100=0.05

b=1+0.05=1.05

substitute

f(x)=23,000(1.05)^{x}

x ----> is the number of years since 1985

How many members will there be in 2020?

x=2020-1985=35 years

substitute in the function

f(x)=23,000(1.05)^{35}=126,868\ members

Round to the nearest thousand

126,868=127,000\ members

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