Math  /  Algebra

QuestionA population numbers 19,000 organisms initially and grows by 17.4\% each year. Suppose PP represents population, and tt the number of years of growth. An exponential model for the population can be written in the form P=abtP=a \cdot b^{t} where P=P=

Studdy Solution

STEP 1

What is this asking? We need to find a formula that tells us the population at any year, given that it grows by a certain percentage every year. Watch out! Don't mix up the **initial population** and the **growth rate**.
Also, remember to convert the percentage to a decimal!

STEP 2

1. Define the function
2. Calculate the result

STEP 3

Alright, so we're given the general form of an exponential function: P=abtP = a \cdot b^{t}.
Here, PP is the population after tt years, aa is the **initial population**, and bb is the **growth factor**.

STEP 4

We're told the **initial population** is **19,000**, so a=19,000a = 19,000.
Woohoo! One piece down!

STEP 5

Now, the population grows by **17.4%** each year.
This means that after one year, the population is 100% + 17.4% = 117.4% of what it was before.
As a decimal, this is **1.174**.
So, our **growth factor**, bb, is **1.174**.

STEP 6

Putting it all together, our exponential model is P=19,000(1.174)tP = 19,000 \cdot (1.174)^{t}.
Boom!

STEP 7

The problem asks for the exponential model, which we just found!
It's P=19,000(1.174)tP = 19,000 \cdot (1.174)^{t}.
We're done!
High five!

STEP 8

P=19,000(1.174)tP = 19,000 \cdot (1.174)^{t}

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