Exponential Functions and Decrease Rates

Exponential Functions and Decrease Rates

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Hard

Created by

Thomas White

FREE Resource

This video tutorial covers exponential functions in algebra, focusing on calculating decreases in speed and price over time. It includes detailed examples of how to use exponential formulas to determine percentage decreases over specific periods, using a graphing calculator for precise calculations. The lesson concludes with a summary of the key concepts and encourages viewers to engage with the content through comments and likes.

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main focus of the lesson on exponential functions?

Understanding linear equations

Graphing linear functions

Solving quadratic equations

Manipulating percentages

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If an object's speed decreases by 5% each minute, what is the total decrease over 30 minutes?

30%

79%

50%

15%

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the value of k when the speed decreases by 5% each minute for 30 minutes?

-0.214

-0.785

-0.5

-0.05

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Over the past 10 years, the price of corn decreased by 25%. What is the annual decrease rate?

10%

25%

5%

2.8%

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the value of r when the price decreases by 25% over 10 years?

-0.05

-0.1

-0.25

-0.028

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Assuming the annual decrease rate continues, what is the total decrease in the price of corn after 50 years?

30%

50%

76%

15%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the value 0.237304 in the context of the price decrease problem?

It represents the initial price

It is the annual decrease rate

It is the total decrease over 10 years

It is the remaining percentage of the original price

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