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EOC Practice #8

EOC Practice #8. SPI 3102.2.2. EOC Practice #8. Multiply, divide, and square numbers expressed in scientific notation. One gram of water contains about 3.34 x 10 22 molecules. About how many molecules are contained in 5.0 x 10 2 grams of water?

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EOC Practice #8

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  1. EOC Practice #8 SPI 3102.2.2

  2. EOC Practice #8 • Multiply, divide, and square numbers expressed in scientific notation.

  3. 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

  4. 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

  5. The radius of a red blood cell is • approximately 1.9375 x 10-7meters. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. The Answers

  12. 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

  13. 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

  14. The radius of a red blood cell is • approximately 1.9375 x 10-7meters. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

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