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anastassius [24]
3 years ago
9

The population of osaka japan declined at an average annual rate of 0.05% for five years between 1995 and 2000. If the populatio

n of osaka was 11,013,000 in 2000 and it continues to decline at the same rate, predict the population in 2050
Mathematics
1 answer:
fgiga [73]3 years ago
8 0

Answer:

10,741,021\ people

Step-by-step explanation:

we know that

The equation of a exponential decay function can be written as

y=a(1-r)^x

where

y ---> is the population of Osaka japan

x ---> the number of years since 2000

a ---> is the initial value or y-intercept

r is the rate of change

we have

a=11,013,000\ people

r=0.05\%=0.05/100=0.0005

substitute

y=11,013,000(1-0.0005)^x

y=11,013,000(0.9995)^x

Predict the population in 2050

so

2050-2000=50\ years

For x=50 years

substitute in the equation

y=11,013,000(0.9995)^{50}

y=10,741,021\ people

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Step-by-step explanation:

The question is missing, complete question is below:

A Gallup Poll found that 51% of the people in its sample said "yes" when asked, "Would you like to lose weight?" Gallup announced: "With 95% confidence for results based on the total sample of national adults, one can say that the margin of sampling error is ± 3%."

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(b) What does it mean to say that we have 95% confidence in this interval?

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Solve for <em>x</em> and <em>y</em> :

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<em>x</em> ² + (1 - <em>x</em>)² = -1

<em>x</em> ² + (1 - 2<em>x</em> + <em>x</em> ²) = -1

2<em>x</em> ² - 2<em>x</em> + 1 = -1

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In either case, we get

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so the answer is (2) 1.

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