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Day 7 ­ Applications ­ Compound Interest Notes.notebook

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April 11, 2019

EOC Spiral Review - Unit 2 4/9/19

Answer # 1 - 7 from the Coach Booklet in your INB.

pages 11-12

Day 7 ­ Applications ­ Compound Interest Notes.notebook

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Day 7 ­ Applications ­ Compound Interest Notes.notebook

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Day 7 ­ Applications ­ Compound Interest Notes.notebook

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4/9/19 Unit 3BDay 7 ­ Applications of Exponential Functions ­ Compound InterestPage 24

Day 7 ­ Applications ­ Compound Interest Notes.notebook

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Essential Question 4/9/19

How can I use exponential functions to solve compound interest problems?

Standard:MGSE9-12.A.CED.2

Create exponential equations in two or more variables to represent relationships between quantities. (The phrase “in two or more variables” refers to formulas like the compound interest formula, in which A = P(1 + r/n)nt has multiple variables.)

Day 7 ­ Applications ­ Compound Interest Notes.notebook

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Compound Interest

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Example 1

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Example 2

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Example 3

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30 Seconds Expert:

Talk with your table partner

1. What are the parts of the formula for compound interest?

2. Explain the parts.

Day 7 ­ Applications ­ Compound Interest Notes.notebook

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Class Work/Home Work -

4/10/19

Day 6: Applications of Exponential Functions # 1 - 5

Day 7 ­ Applications ­ Compound Interest Notes.notebook

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Work with your table partner...

Day 7 ­ Applications ­ Compound Interest Notes.notebook

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Example 2: A pot of soup, currently at 84 C is left out to cool. If that temperature decreases by 5% per minute, what will the temperature be in 5 minutes?

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Example 3: The population of a small town started at 233 people in 1999. If the population grows at a rate of 16% per year, how many people are now in the town in 2006?

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Example 5: The value of a rare baseball card increases every year at a rate of 4%. Today, the card is worth $300. The owner expects to sell the card as soon as the value is over $600. How many years will the owner wait before selling the card? Round your answer to the nearest whole number.

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Closing:

If there is a % change, the base for growth is (_____) and for decay is (_____).

What's going to be the base of the exponential function in the following cases?

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1. 20% increase 2. 15% decrease

3. 8% increase 4. 4% decrease

5. 12.5% increase 6. 42.5% decrease

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