Solve It! The half-life of a radioactive substance is the length of time it takes for half of the atoms in a sample of the substance to decay. The half-life of uranium-238 is expressed in scientific noation below.
Suppose you have a sample of 1000 uranium-238 atoms. How many atoms of uranium-238 are left after the following number of years?
Enter only the number of atoms.
Problem 1 Got It?
Vocabulary: Define compound interest in your own words.
Problem 2 Got It?
Problem 3 Got It?
Problem 3 Got It?
Reasoning: How can you simplify the compound interest formula when the interest is compounded annually? Explain.
Error Analysis: A student deposits $500 into an account that earns 3.5% interest compounded quarterly. Describe and correct the student's error in calculating the account balance after 2 yr.
Review Lesson 7-6: Graph the function. Zoom and pan your graph to establish an appropriate viewing window.
Review Lesson 7-6: Graph the function. Zoom and pan your graph to establish an appropriate viewing window.
Review Lesson 7-6: Graph the function on the canvas. Include all relevant graph detail.
Review Lesson 3-4: Match each value with
-5
-1
0
2
8
7x + 2 < 16
(1/2)t - 4 ≥ -3
-0.08 > 0.35k - 0.15
Review Lesson 4-7: Write an explicit formula for each arithmetic sequence on the canvas.
Vocabulary Review: Match each situation and the equation that models it.
A person begins with $100 and earns $2 each day.
A person begins with $2 and earns $100 each day.
A person begins with $100. Each day the money doubles.
Use Your Vocabulary: Use the words in the left column to correctly complete each sentence on the right.
compound interest
simple interest
principal
The amount of money deposited in an account is the __?__.
The amount of money earned on an investment only is __?__.
Interest earned on both the principal and the interest left in the account is __?__.
Use Your Vocabulary: Use the situation below and identify the principal, interest rate, time in years, and balance.
1200
1.25
5
1276.9
Principal
Interest rate
Time in years
Balance
Use Your Vocabulary: Classify the values based on whether they could be a growth factor or decay factor.
85%
3
1/2
1.05
100%
0.93
1
Growth factor
Decay factor
None of these
Notes: Take a clear picture or screenshot of your Cornell notes for this lesson. Upload it to the canvas. Zoom and pan as needed.
For a refresher on the Cornell note-taking system, click here.
Reflection: Math success
