eoc practice #8spi 3102.2.2. eoc practice #8 multiply, divide, and square numbers expressed in...
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![Page 1: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/1.jpg)
EOC Practice #8 SPI 3102.2.2
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EOC Practice #8
• Multiply, divide, and square numbers expressed in scientific notation.
![Page 3: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/3.jpg)
1. One gram of water contains about 3.34 x 1022 molecules. About how
many molecules are contained in 5.0 x 102 grams of water?
A. 1.67 x 1025 C. 6.68 x 1019
B. 8.84 x 1024 D. 1.49 x 10–20
![Page 4: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/4.jpg)
2. Simplify (6.5 x 103)2.
A. 13 x 106
B. 13.0 x 106
C. 4.23 x 107
D. 42.2 x 108
![Page 5: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/5.jpg)
3. The radius of a red blood cell is approximately 1.9375 x 10-7
meters. Since a red blood cell is a circular shape, use A= r2 to approximate the area of a red blood cell.
A. 3.875 x 10–14 C. 1.179 x 1015
B. 1.179 x 10–13 D. 3.875 x 10–13
![Page 6: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/6.jpg)
4. Simplify (3.15 x 103)(5.0 x 105). Express your answer in scientific notation.
A. 1575 x 109
B. 1.575 x 108
C. 15.75 x 1010
D. 1.575 x 109
![Page 7: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/7.jpg)
5. Evaluate and express the answer in scientific notation.
6.3 x 109 1.3 x 102
A. 48 x 108 C. 4.8 x 107
B. 48000000 D. 4.8 x 101
![Page 8: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/8.jpg)
6. Which expression is closest to
(7.09 x 10–8)(9.033 x 1027)?
A. 6.404 x 1020
B. 6.404 x 1035
C. 16.123 x 1019
D. 16.123 x 1035
![Page 9: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/9.jpg)
7. The approximate population of Arizona is 4.778 x 106 people. The land area is about 1.14 x 105. What is the population density per square mile?
A. about 0.24 people per spare mile
B. about 4,892,000 people per square mile
C. about 5.45x1011 people per square mile
D. about 42 people per square mile
![Page 10: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/10.jpg)
8. If an infrared wavelength measures about 8 x 10–7 meters, and a blue wavelength
measures approximately 4.5 x 10–7 meters, about how many times longer is the infrared wavelength than the blue wavelength?
A. about 0.56 times
B. about 1.8 times
C. about 3.6 x 10–13 times
D. about 1.25 x 10–6 times
![Page 11: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/11.jpg)
The Answers
![Page 12: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/12.jpg)
1. One gram of water contains about 3.34 x 1022 molecules. About how
many molecules are contained in 5.0 x 102 grams of water?
A. 1.67 x 1025 C. 6.68 x 1019
B. 8.84 x 1024 D. 1.49 x 10–20
![Page 13: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/13.jpg)
2. Simplify (6.5 x 103)2.
A. 13 x 106
B. 13.0 x 106
C. 4.23 x 107
D. 42.2 x 108
![Page 14: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/14.jpg)
3. The radius of a red blood cell is approximately 1.9375 x 10-7
meters. Since a red blood cell is a circular shape, use A= r2 to approximate the area of a red blood cell.
A. 3.875 x 10–14 C. 1.179 x 1015
B. 1.179 x 10–13 D. 3.875 x 10–13
![Page 15: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/15.jpg)
4. Simplify (3.15 x 103)(5.0 x 105). Express your answer in scientific notation.
A. 1575 x 109
B. 1.575 x 108
C. 15.75 x 1010
D. 1.575 x 109
![Page 16: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/16.jpg)
5. Evaluate and express the answer in scientific notation.
6.3 x 109 1.3 x 102
A. 48 x 108 C. 4.8 x 107
B. 48000000 D. 4.8 x 101
![Page 17: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/17.jpg)
6. Which expression is closest to
(7.09 x 10–8)(9.033 x 1027)?
A. 6.404 x 1020
B. 6.404 x 1035
C. 16.123 x 1019
D. 16.123 x 1035
![Page 18: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/18.jpg)
7. The approximate population of Arizona is 4.778 x 106 people. The land area is about 1.14 x 105. What is the population density per square mile?
A. about 0.24 people per spare mile
B. about 4,892,000 people per square mile
C. about 5.45x1011 people per square mile
D. about 42 people per square mile
![Page 19: EOC Practice #8SPI 3102.2.2. EOC Practice #8 Multiply, divide, and square numbers expressed in scientific notation](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649c995503460f949566c4/html5/thumbnails/19.jpg)
8. If an infrared wavelength measures about 8 x 10–7 meters, and a blue wavelength
measures approximately 4.5 x 10–7 meters, about how many times longer is the infrared wavelength than the blue wavelength?
A. about 0.56 times
B. about 1.8 times
C. about 3.6 x 10–13 times
D. about 1.25 x 10–6 times