Round Goby….A Big Problem for the Great Lakes. How They got There: A Container Ship from Europe to...
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Transcript of Round Goby….A Big Problem for the Great Lakes. How They got There: A Container Ship from Europe to...
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Round Goby….A Big Problem for the Great Lakes
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How They got There: A Container Ship from Europe to the United States
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2 640,000,000
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How did the fish population grow so fast?
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Great for finding out:
1. Populations2. Radiation3. Disease4. How rich you can get from an investment5. How much money you owe the bank6. Your credit card bill
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Exponential Growth Equation
Y = a(b) x
Startingamount
Growthor Decay
Factor
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You decide to buy a house for $3000. The bank loans you the money at 14% interest (a growth rate of 1.14).
Can you find the equation for the amount you owe the bank: hint: Find the initial amount. Find the growth factor.
Y = 3000(1.14)x
$41,230.47
How much will you owe the bank after 20 years?
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Prison Population the United States between 1986-2003
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year Population
1986 522,000
1987 560,812
1988 603,732
1989 680,907
1990 739,980
2003 1,500,000
Y = 522,000(1.07)x
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THE PROBLEM WITH BUNNIES
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A Couple of Rabbits Introduced to Australia by England in 1827
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By 1990: 300,000,000 Rabbits
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Plant Life before Rabbits
AfterRabbits
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Yearly Cost to Farmers:
$600,000,000
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Rabbit Data
Generations Population
0 100
1 180
2 325
3 583
4 1050
Equation for bunny population growth:
Y = 100(1.8)x
What does the growth
look like on a graph?
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The graph is special.
Common Graphaka: linear graph
Example situation: you save $5 each week
Example situation: I get one dollar the first week and double the
amount each week.
Exponential Graph
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3
9
x y
0 2
1 8
2 32
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Y = 2(4)x
4.
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How well do you understand
exponential graphs and equations?
3: Totally Understand2: Understand some parts1: Unsure