MATH 1280 BCCC Chapter 4 Interest Rate Math Problems

Chapter 4 Review Quiz_On-line
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Question 22
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B0/1 pt 53 Details
A wooden artifact from an ancient tomb contains 40 percent
of the carbon-14 that is present in living trees. How long
ago, to the nearest year, was the artifact made? (The half-
life of carbon-14 is 5730 years.)
years.
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Chapter 4 Review Quiz_On-line
01hr51mins X
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Question 23
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B0/1 pt 5 3 0 Details
The count in a bacteria culture was 500 after 10 minutes
and 1400 after 35 minutes. Assuming the count grows
exponentially,
What was the initial size of the culture?
Find the doubling period.
Find the population after 80 minutes.
When will the population reach 12000.
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Chapter 4 Review Quiz_On-line
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Question 24
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B0/1 pt 53 Details
Find the time required for an investment of 5000 dollars to
grow to 8500 dollars at an interest rate of 7.5 percent per
year, compounded quarterly.
Your answer is t =
years.
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Chapter 4 Review Quiz_On-line
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Question 25
B0/1 pt 5 3 0 Details
The number line below shows a value on a log scale.
log(x)
+
-5 -4 -3 -2 -1
+
0
1
2
3
4
What is the value of the point?
X =
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Chapter 4 Review Quiz_On-line
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Done 6 Vo :
Question 26
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B0/1 pt 53 Details
One earthquake has MMS magnitude 5.3. If a second
earthquake has 190 times as much energy (earth movement)
as the first, find the magnitude of the second quake.
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