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BabaBlast [244]
2 years ago
13

A city's population is 12,000 and grows at 2.6% rate. What will the population be after 25 years? A city's population is 230,000

and decreases at a 4.4% rate. What will the population be after 14 years?
Mathematics
2 answers:
Levart [38]2 years ago
3 0

Answer:

The 12000 City would become 22,986 people, while the 230,000 city would become a population of 124,223.

Step-by-step explanation:

1st Part:

=12000⋅(0.026000000000000002⋅25)

=12000(2.718281828459045)(0.65)

=22986

2nd Part:

=230000⋅(−0.044000000000000004⋅14)

=230000(2.718281828459045)(−0.616)

=124223

Fynjy0 [20]2 years ago
3 0

Answer:

Step-by-step explanation:

First question.

We would apply the formula for exponential growth which is expressed as

A = P(1 + r)^t

Where

A represents the population after t years.

t represents the number of years.

P represents the initial population.

r represents rate of growth.

From the information given,

P = 12000

r = 2.6% = 2.6/100 = 0.026

n = 25 years

Therefore,

A = 12000(1 + 0.026)^25

A = 12000(1.026)^25

A = 22796

Second question

The formula for exponential decay is

A = P(1 - r)^n

r = 4.4% = 0.044

n = 14 years

P = 230000

Therefore,

A = 230000(1 - 0.044)^14

A = 230000(0.956)^14

A = 122501

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Answer:

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Step-by-step explanation:

<u>Function modeling</u>

Real-life situations often require the help of mathematics to model numerically what happens when the variables involved can change. It could even be used to predict some expected outcomes from those models.

The problem states Janice receives $.40 per pound when he recycles less or equal than 99 pounds of aluminum. If x is the number of recycled pounds, then the amount of money he receives is

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This is a case where the function is defined differently depending on the conditions of the input variable x. It's called a piecewise function. The function can be written as

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