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anonymous

  • one year ago

help??

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  1. anonymous
    • one year ago
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    Hi! What do you need help with?

  2. anonymous
    • one year ago
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    What you need help with?

  3. anonymous
    • one year ago
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    1. Suppose that the amount of algae in a pond doubles every 4 hours. If the pond initially contains 90 pounds of algae, how much algae will be in the pond after 12 hours? (1 point) 720 pounds 360 pounds 1,440 pounds 114 pounds

  4. anonymous
    • one year ago
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    Alright, this sounds pretty easy! Okay, so, it doubles every hour.

  5. anonymous
    • one year ago
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    it will double three times since \(12\div 4=3\)

  6. anonymous
    • one year ago
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    if we start at 90, after 4 hours it will be how much?

  7. anonymous
    • one year ago
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    180

  8. anonymous
    • one year ago
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    Yep! so, then we add 4 more hours to that to make it 8 hours. How much is it now?

  9. anonymous
    • one year ago
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    360

  10. anonymous
    • one year ago
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    Yep! now, lets add a final 4 hours to make it 12. How much is it now?

  11. anonymous
    • one year ago
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    720

  12. anonymous
    • one year ago
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    Yep! So, at 12 hours there will be 720 pounds of algae :) Great job anna!

  13. anonymous
    • one year ago
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    2. What is the order of the numbers from least to greatest? A = 6.2 × 10–5 B = 12.3 × 10–7 C = 5.2 × 103 D = 3.7 × 10–5 (1 point) D < C < A < B B < D < A < C D < C < A < B B < A < C < D

  14. anonymous
    • one year ago
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    Okay, well first we need to simplify this, and multiply them. After you do this, what do you get?

  15. anonymous
    • one year ago
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    (Dont forget the order of operations, multiplication comes before subtraction)

  16. anonymous
    • one year ago
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    So, for A, you would do (6.2 x 10) - 5

  17. anonymous
    • one year ago
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    i cant figure out how to find 5.2x10^3

  18. anonymous
    • one year ago
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    Okay, well you would do the exponent first (im assuming thats an exponent?) so, you would do 10 x 10 first, which equals 100. then, 100 x 10 which equals 1000. From there, you take 1000 x 5.2 which is?

  19. anonymous
    • one year ago
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    5200

  20. anonymous
    • one year ago
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    they are actually all exponents

  21. anonymous
    • one year ago
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    Oh, can you re-write them with the ^ like you did the last time to make it for clear? If not, let me know if you have a difficulty and i can explain it :) after we multiply this, it should be very easy to see the smallest number, greatest number, and everything in-between :)

  22. anonymous
    • one year ago
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    And yes, 5200 is correct :) Good job!

  23. anonymous
    • one year ago
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    2. What is the order of the numbers from least to greatest? A = 6.2 × 10^–5 B = 12.3 × 10^–7 C = 5.2 × 10^3 D = 3.7 × 10^–5 (1 point) D < C < A < B B < D < A < C D < C < A < B B < A < C < D

  24. anonymous
    • one year ago
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    Okay, that helps, thank you. Well, now we know that C = 5200. Have you done A and B as well?

  25. anonymous
    • one year ago
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    idk how to do it with negatives

  26. anonymous
    • one year ago
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    Well, there are some rules when multiplying integers. Positive x negative = negative Positive x positive = positive negative x negative = positive negative x positive = negative So, 2 positives makes a positive. 2 negatives makes a positive, and 1 negative makes a negative. I know it probably will be hard to learn, but youll get it eventually :) Practice makes perfect! And dont be afraid to look it up if you need to :)

  27. anonymous
    • one year ago
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    i cant figure it out

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