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anonymous

  • one year ago

The population of mathville is 5.6×10³. The population of algeville is 1.3×10⁴. How many people are the in algeville ? PLZZ HELP !!

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  1. anonymous
    • one year ago
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    The population is the amount of people, so there would be \[1.3*10^4\] people. Which is the same as 130000.

  2. anonymous
    • one year ago
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    Should I divide or subtract since its asking how many "more" people are there in algeville ?

  3. skullpatrol
    • one year ago
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    subtract to find the difference between the two populations

  4. anonymous
    • one year ago
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    @skullpatrol since its subtracting scientific notation it would be 5.6×10³ - 1.3×10⁴ ?

  5. skullpatrol
    • one year ago
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    yes

  6. anonymous
    • one year ago
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    You should subtract 1.3×10⁴-5.6×10³

  7. skullpatrol
    • one year ago
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    but change the numbers so they are easier to work with

  8. skullpatrol
    • one year ago
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    |dw:1442760019063:dw|

  9. skullpatrol
    • one year ago
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    Can you handle it from here?

  10. anonymous
    • one year ago
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    @skullpatrol I never actually thought of doing that until now because at schooll my math teachers taught me to move the decimal which makes the exponent decrease by one for example instead of 1.3 it would be 13. Because the decimal is moved to right then you would subtract 1 from the ³

  11. skullpatrol
    • one year ago
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    yes you can do it that way too :-)

  12. anonymous
    • one year ago
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    I subtracted 130000-56000 and I got 7400

  13. skullpatrol
    • one year ago
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    |dw:1442760369547:dw|

  14. skullpatrol
    • one year ago
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    |dw:1442760626496:dw|

  15. skullpatrol
    • one year ago
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    |dw:1442760669460:dw|

  16. anonymous
    • one year ago
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    @skull patrol since it's a word problem my answer would be - "there is 7,400 more people in algeville than Mathville" ?

  17. skullpatrol
    • one year ago
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    yes

  18. anonymous
    • one year ago
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    Alrighty THANKKKKKK you so MUCH !!!! @skullpatrol really appreciated your help :)

  19. skullpatrol
    • one year ago
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    Thanks for asking :-)

  20. anonymous
    • one year ago
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    @skullpatrol can you help me with one more problem ?

  21. anonymous
    • one year ago
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    \[1.3*10^4-5.6*10*3=1.3*10*10^3-5.6*10^3=\left( 1.3*10-5.6 \right)*10^3\] \[=\left( 13.0-5.6 \right)*10^3=7.4*10^3=\frac{ 74 }{ 10 }*1000=7400\]

  22. anonymous
    • one year ago
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    Thanks @surjithayer

  23. anonymous
    • one year ago
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    yw

  24. anonymous
    • one year ago
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    correction 5.*10^3 not 5.6*10*3

  25. anonymous
    • one year ago
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    @skullpatrol can you help me with this one ~ total health care costs in the United states in 2003 was $1.3 trillion . The U.S population was $290.9 million . What was the average amount spent per person on helthcare ?

  26. skullpatrol
    • one year ago
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    Any ideas?

  27. anonymous
    • one year ago
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    Sorry typo i meant 290.9 million

  28. skullpatrol
    • one year ago
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    I see np :-)

  29. anonymous
    • one year ago
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    I was thinking of turning 1.7 to 17,000,000,000,000

  30. skullpatrol
    • one year ago
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    What does " the average amount spent per person on healthcare" mean to you?

  31. anonymous
    • one year ago
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    Um I think it means like the the amount spent on each person

  32. skullpatrol
    • one year ago
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    |dw:1442761950976:dw|

  33. anonymous
    • one year ago
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    So it would be 1.7 trillion ÷ 290.9

  34. skullpatrol
    • one year ago
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    Yes, but you missed the million on 290.9 million

  35. skullpatrol
    • one year ago
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    Also a trillion is $$\Huge 10^{12}$$

  36. skullpatrol
    • one year ago
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    |dw:1442762338080:dw|

  37. anonymous
    • one year ago
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    Alrighty so it would be 290.9×10^6 ÷ 1.3 × 10^11 ?

  38. skullpatrol
    • one year ago
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    10^12

  39. anonymous
    • one year ago
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    Yeah 10^12 my bad

  40. skullpatrol
    • one year ago
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    np

  41. anonymous
    • one year ago
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    When I divided 290.9 by 1.3 I got 223.769231

  42. skullpatrol
    • one year ago
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    yes

  43. anonymous
    • one year ago
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    But isn't it too large ?

  44. skullpatrol
    • one year ago
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    nope

  45. anonymous
    • one year ago
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    Kk so when I subtracted my exponents I got -6

  46. skullpatrol
    • one year ago
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    |dw:1442762966778:dw|

  47. skullpatrol
    • one year ago
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    check the word "trillion"

  48. anonymous
    • one year ago
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    Alrighty so the average person payed $223 ?

  49. anonymous
    • one year ago
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    Wait isn't the 290.9 supposed to be on top ?

  50. anonymous
    • one year ago
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    Are you there @skullpatrol?

  51. skullpatrol
    • one year ago
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    you want dollars per person

  52. anonymous
    • one year ago
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    Yeah so it's $223 per person or $23.30 ?

  53. skullpatrol
    • one year ago
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    what about the powers of 10?

  54. anonymous
    • one year ago
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    223×10^-6 because 6-12 = -6

  55. anonymous
    • one year ago
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    I got it now

  56. anonymous
    • one year ago
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    Thanks again @skullpatrol

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