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EmmaH

Evaluate the following. Write your answer in scientific notation. (3 x 107)(6.1 x 103) 18.3 x 1010 18.3 x 1021 1.83 x 1010 1.83 x 1011

  • one year ago
  • one year ago

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  1. Hero
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    Multiply 6.1 x 3 Then Multiply 10^7 x 10^3 by adding exponents Finally move the decimal point accordingly. Moving the decimal point on place to the left you increase the exponent by 1 6.1 x 3 = 18.3 10^7 x 10^3 = 10^10 so you have 18.3 x 10^10 But we have to express in scientific notation so: 1.83 x 10^11

    • one year ago
  2. EmmaH
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    thank you so much!

    • one year ago
  3. inkyvoyd
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    Hero since when do you give direct answers o.o

    • one year ago
  4. inkyvoyd
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    also, herro hero!

    • one year ago
  5. Hero
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    I don't consider it giving direct answer as much as I consider it demonstration of the process. After demonstration, then I expect the user to know how to do it. Sometimes you have to demonstrate how to solve a problem.

    • one year ago
  6. Hero
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    If I just simply stated the answer is 1.83 x 10^11, then that is just giving the answer without explanation.

    • one year ago
  7. EmmaH
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    hey so would: Evaluate and write your answer in scientific notation: (2 x 107)(1.3 x 10-3) 2.6 x 10^4 2.6 x 10^-21 2.6 x 10^-4 be 2.6x10^4

    • one year ago
  8. inkyvoyd
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    mm - I refuse to give out answers explicitly, which is most likely why I'm not gaining any smartscore. But I do believe that even with teh process, many users just look at the answer.

    • one year ago
  9. Hero
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    Well, I guess we're gonna find out what @EmmaH is about.

    • one year ago
  10. Hero
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    @EmmaH, the process of solving this next problem is the same as the previous one.

    • one year ago
  11. Hero
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    The only difference is you have to subtract the exponents instead of add them.

    • one year ago
  12. Hero
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    Everything else is the same.

    • one year ago
  13. Hero
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    Well, it will require some guidance but you should at least be able to multiply the decimals and the exponents. Can you try it please?

    • one year ago
  14. EmmaH
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    ok so 10^7- 10^-3 would that be 10^11?

    • one year ago
  15. Hero
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    No, it would not. Subtract exponents means to subtract 3 from 7.

    • one year ago
  16. EmmaH
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    but isnt it a -3?

    • one year ago
  17. Hero
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    And you don't write it like that. You write it like this: 10^(7-3)

    • one year ago
  18. EmmaH
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    oooooh!

    • one year ago
  19. EmmaH
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    10^4

    • one year ago
  20. Hero
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    Yes, exactly. So which answer choice is it?

    • one year ago
  21. EmmaH
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    the first

    • one year ago
  22. Hero
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    Good job

    • one year ago
  23. EmmaH
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    thanks for the help!!

    • one year ago
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