Topic 4 Review.notebook
December 06, 2012
Topic 4 Review
1. Write the following in order from least to greatest.
5.43 x 108 5.43 x 10­4
5.43 x 103
2. Suppose your calculator display shows 8.5E­7. Express this result in scientific notation.
3. Express 250,000 in scientific notation.
4. Express 0.00035 in scientific notation.
5. Express 3.4 x 104 in standard form.
6. Express 8.92 x 10­4 in standard form.
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Topic 4 Review.notebook
December 06, 2012
7. A scientist has two colonies of bacteria, A and B. Colony A has 6.4 x 106 bacteria. Colony B has 320,000 bacteria. Express the bacteria in Colony B in scientific notation.
The number of bacteria in Colony A is how many times the number of bacteria in Colony B? 8. Which number is greater, 5 x 108 or 3 x 1010
9. Which number is greater, 4 x 10­8 or 2 x 10­3
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Topic 4 Review.notebook
December 06, 2012
10. Which of the following is written in scientific notation?
0.4 x 10­3
6 x 10­4
40 x 103
11. Subtract and write your answer in scientific notation.
8.4 x 105 ­ 4.2 x 105
12. Simplify the expression. Write the answer in scientific notation.
(8 x 10­4)(3 x 10­8)
13. Divide. Express your answer in scientific notation.
12 x 10­5
5 x 10­3
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Topic 4 Review.notebook
December 06, 2012
14. A research study reports that an average person purchases 330 granola bars per year. If there are 259 million people in the country, how many granola bars are purchased by the whole country in one year? Write your answer in scientific notation.
15. Two stars are 9.996 x 1015 miles apart. Express this distance in scientific notation using an appropriate unit from the given list. What is the most appropriate unit for expressing the distance between the two stars? How far apart are the two 1 mile ≈ 1,609 meters
stars?
1 kilometer ≈ 1,000 meters
1 light­year ≈ 5.88 x 1012
A. The most appropriate unit is the light­year. The stars
are ___________light­years apart.
B. The most appropriate unit is the kilometer. The stars
are ___________kilometers apart.
C. The most appropriate unit is the meter. The stars are
______________meters apart.
D. The most appropriate unit is the mile. The distance in miles is given.
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Topic 4 Review.notebook
December 06, 2012
16. What is the value of n?
1.8 x 1015 = (2 x 1010)(9 x 10n)
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