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MrNebula

  • one year ago

Please explain how I can use math to solve the problem. Sarah drops a penny from a height of 1250 feet. I will be using h for height and t for time in seconds, this will be modeled in the function h = -16t^2 + 1250. How will it take for Sarah’s penny to reach the ground? How I would do it is get this "Sarah" to drop the penny again so I can just count how long it takes. But I have to use "Math" to solve it. How do I use "Math" to solve it? Explain, PLEASE NO DIRECT ANSWER I WANT TO LEARN

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  1. geekfromthefutur
    • one year ago
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    Hey how are you?

  2. MrNebula
    • one year ago
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    Not good, I really need help

  3. geekfromthefutur
    • one year ago
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    Ok, well im here to help ya. So you can get this nasty math problem out of the way sound good?

  4. MrNebula
    • one year ago
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    Yes after I read what you said I nearly cried :D

  5. geekfromthefutur
    • one year ago
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    Lol

  6. geekfromthefutur
    • one year ago
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    Just to let you know im looking over your problem and getting all the facts.

  7. MrNebula
    • one year ago
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    I know im letting you take your time if you dont understand what its asking let me know

  8. MrNebula
    • one year ago
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    I need the formula to the answer explained

  9. geekfromthefutur
    • one year ago
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    Nah i get it now.

  10. MrNebula
    • one year ago
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    K

  11. geekfromthefutur
    • one year ago
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    First, we are going to have to multiply 16 ^2

  12. MrNebula
    • one year ago
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    With what?

  13. geekfromthefutur
    • one year ago
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    Thats it we have to solve 16^2. You know how if noti will show you how.

  14. geekfromthefutur
    • one year ago
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    its a step to solving the equation

  15. MrNebula
    • one year ago
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    I know that the ^2 is the square root right?

  16. geekfromthefutur
    • one year ago
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    Correct

  17. MrNebula
    • one year ago
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    So do you 16 * 2 thats easy

  18. geekfromthefutur
    • one year ago
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    K what did u get

  19. MrNebula
    • one year ago
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    Easy 32

  20. geekfromthefutur
    • one year ago
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    ok do it with a negative -16

  21. MrNebula
    • one year ago
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    Um - 32

  22. geekfromthefutur
    • one year ago
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    Lol correct

  23. MrNebula
    • one year ago
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    Hehe

  24. geekfromthefutur
    • one year ago
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    Ok so now we have to do this -32t + 1250 now solve that

  25. MrNebula
    • one year ago
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    1218t right?

  26. MrNebula
    • one year ago
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    Why do we have t all the sudden?

  27. geekfromthefutur
    • one year ago
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    the t has been there lol h = -16t^2 + 1250.

  28. geekfromthefutur
    • one year ago
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    and you are correct

  29. MrNebula
    • one year ago
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    I know that but why are we multiplying it with 1218t?

  30. MrNebula
    • one year ago
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    1218*

  31. geekfromthefutur
    • one year ago
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    Ok and i already asked my friend @Thesmarterone to help

  32. MrNebula
    • one year ago
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    Oh I see because it was with the 16

  33. MrNebula
    • one year ago
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    Ok

  34. geekfromthefutur
    • one year ago
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    If he dont come ill help

  35. MrNebula
    • one year ago
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    If he does will he replace you?

  36. geekfromthefutur
    • one year ago
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    Actually I messed up lol xD it is 32 seconds it takes to fall to cut it short

  37. MrNebula
    • one year ago
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    To cut it short?

  38. geekfromthefutur
    • one year ago
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    well ik i messed up

  39. MrNebula
    • one year ago
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    Ok im kinda lots with that, but restart then?

  40. geekfromthefutur
    • one year ago
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    lemme c if i can get some1 in here if not we will work together again lol sorry this turned into a long problem

  41. MrNebula
    • one year ago
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    Its ok man I got all day if we need to

  42. MrNebula
    • one year ago
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    This problem may save my butt in school so I dont care how long it takes

  43. geekfromthefutur
    • one year ago
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    @ganeshie8 @just_one_last_goodbye

  44. geekfromthefutur
    • one year ago
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    What school is this?

  45. MrNebula
    • one year ago
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    Wow wolframalph can do that! dang...

  46. MrNebula
    • one year ago
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    Oh connections

  47. geekfromthefutur
    • one year ago
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    i do flvs and yea that should help

  48. MrNebula
    • one year ago
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    Hi Captain America

  49. MrNebula
    • one year ago
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    Well I can use the graph to show some extra data...

  50. geekfromthefutur
    • one year ago
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    Hey last idk if you could help or not

  51. MrNebula
    • one year ago
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    I still will need to show how I came up with the answer and I dont want it as a "direct answer"

  52. geekfromthefutur
    • one year ago
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    Tru

  53. MrNebula
    • one year ago
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    Still need step by step explination

  54. geekfromthefutur
    • one year ago
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    Ok well lets see first you mutiply -16 x 2 and you get -32t

  55. MrNebula
    • one year ago
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    Ya

  56. geekfromthefutur
    • one year ago
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    So then, The total seconds it fallen was 32 seconds. Because when you mutiply 16*2 it will give u -32 and with the 1250 it was already part of the problem so the only thing needed to be done was mutiplication and solving 16*2

  57. MrNebula
    • one year ago
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    Oh ok

  58. geekfromthefutur
    • one year ago
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    Good?

  59. MrNebula
    • one year ago
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    Ya so t is -32?

  60. MrNebula
    • one year ago
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    Or just 32?

  61. geekfromthefutur
    • one year ago
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    T IS 32 lol sry caps

  62. MrNebula
    • one year ago
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    So 32 per feet?

  63. MrNebula
    • one year ago
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    That is slow falling that cant be right

  64. geekfromthefutur
    • one year ago
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    @satellite73 Is this correct

  65. MrNebula
    • one year ago
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    Well I guess with the wind pushing the penny up making the fall slower

  66. MrNebula
    • one year ago
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    if it is correct then all I have to do is times 32 by 1250 that will give me how much time it takes from top to bottom

  67. geekfromthefutur
    • one year ago
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    THATS WHAT I FORGOT TO DO DA* IM DUM

  68. MrNebula
    • one year ago
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    Wait you didn't think to times 32 by 1250?

  69. geekfromthefutur
    • one year ago
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    No because it you mutiplied it would be to high of a nimber so we have to divide the time

  70. MrNebula
    • one year ago
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    Ok... If you say so. Go on

  71. geekfromthefutur
    • one year ago
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    So now how would u do it 32/1250 or 1250/32?

  72. MrNebula
    • one year ago
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    32/1250 would be way to small of a number but why would we 1250/32

  73. geekfromthefutur
    • one year ago
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    Exactly and what would we get and sorry the site got closed down

  74. MrNebula
    • one year ago
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    I didn't notice anything and we would get 39.06

  75. geekfromthefutur
    • one year ago
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    Correct

  76. geekfromthefutur
    • one year ago
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    So thats what it would be

  77. MrNebula
    • one year ago
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    Thats what t is?

  78. geekfromthefutur
    • one year ago
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    Yes ik im right

  79. MrNebula
    • one year ago
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    K so now we times that by 1250 to find the total time from top to bottom

  80. MrNebula
    • one year ago
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    = 48828.125

  81. geekfromthefutur
    • one year ago
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    OK

  82. geekfromthefutur
    • one year ago
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    Now what do you think?

  83. MrNebula
    • one year ago
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    I think that t = 39. and the total time from top to bottom is 48828

  84. geekfromthefutur
    • one year ago
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    Awesome^-^

  85. MrNebula
    • one year ago
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    Thanks I just need to put this down in steps and explain it step by step!

  86. MrNebula
    • one year ago
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    THANK YOU

  87. MrNebula
    • one year ago
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    Ill let you know what my teacher says about it so we can both be corrected if there is a issue

  88. MrNebula
    • one year ago
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    But we should be good ;)

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