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anonymous

  • one year ago

A sandbag was thrown downward from a building. The function f(t) = -16t2 - 32t + 128 shows the height f(t), in feet, of the sandbag after t seconds. Part A: Factor the function f(t) and use the factors to interpret the meaning of the x-intercept of the function. (4 points) Part B: Complete the square of the expression for f(x) to determine the vertex of the graph of f(x). Would this be a maximum or minimum on the graph? (4 points) Part C: Use your answer in part B to determine the axis of symmetry for f(x)? (2 points)

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  1. anonymous
    • one year ago
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    giving medals for answers!!!!!!!!!!

  2. welshfella
    • one year ago
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    First take. -16 out -16(t^2+2t-8) Can you factor this?

  3. anonymous
    • one year ago
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    I have no clue how to do any of this...

  4. welshfella
    • one year ago
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    This factors to the from -16(t+a)(t+b) And to get the x intercepts equate to zero and sovereign for t One of these values of t will be the times when height is zero

  5. welshfella
    • one year ago
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    * solve for t

  6. nincompoop
    • one year ago
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    well let us understand what the equation meant first

  7. nincompoop
    • one year ago
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    solving for t, or anything is pretty useless if you do not understand what it is

  8. anonymous
    • one year ago
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    wait so I substitute the 0 for t?

  9. anonymous
    • one year ago
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    @welshfella ??????????

  10. nincompoop
    • one year ago
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    The function \(f(x) = ax^2 + bx + c \) gives you a general clue about the location or position of the object that is you are working on. The c in the function tells you how high or how far you are starting from. |dw:1434219502610:dw|

  11. nincompoop
    • one year ago
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    You are being asked to factor the function \(f(x) = -16t^2 - 32t + 128 \) and was asked to interpret the x-intercepts. But before you jump into factoring it, you need to remember the general graph for a quadratic equation. It is called a quadratic equation because the highest exponent is 2. |dw:1434219835751:dw|

  12. nincompoop
    • one year ago
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    The x-intercept in a quadratic equation is the location where the graph intercepts the x-axis. If you look closely, the value of y in the x-axis is zero.

  13. nincompoop
    • one year ago
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    The x-intercept in a quadratic equation is the location where the graph intercepts the x-axis. If you look closely, the value of y in the x-axis is zero. And if we interpret this into falling object from a particular height or object thrown from the ground, the intercepts are the zeroes - one of them is where you started. if you make t equals to zero \(f(t) = -16t^2 - 32t + 128 \) you will get what I told you in the beginning - the position function, that is where your object is. |dw:1434220223115:dw|

  14. MeowLover17
    • one year ago
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    AGAINST CODE OF CONDUCT!!!!!

  15. anonymous
    • one year ago
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    This is a Q on a test.

  16. MeowLover17
    • one year ago
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    Yep ^

  17. anonymous
    • one year ago
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    We help you study FOR tests… not ON the test.

  18. nincompoop
    • one year ago
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    do you have a proof that this is from an exam that he/she is taking now?

  19. MeowLover17
    • one year ago
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    I have proof

  20. anonymous
    • one year ago
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    So do I.

  21. nincompoop
    • one year ago
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    then report the person to the school.

  22. MeowLover17
    • one year ago
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    ITS AN online course

  23. MeowLover17
    • one year ago
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    Known as florida virtual school

  24. anonymous
    • one year ago
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    We don't know the identity of this person… so we can't report it.

  25. MeowLover17
    • one year ago
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    I understand that you dont understand the question but you can't be asking that on here. Since its a test question

  26. MeowLover17
    • one year ago
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    Or Quiz question

  27. nincompoop
    • one year ago
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    well I have not given any answer. everything has just been a general description, and I just used the height as an example.

  28. MeowLover17
    • one year ago
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    @nincompoop Keep helping him/her

  29. MeowLover17
    • one year ago
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    Just dont give a direct answer

  30. nincompoop
    • one year ago
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    I will be back later. you can argue with the person while I eat

  31. anonymous
    • one year ago
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    http://prntscr.com/7gk8kd http://prntscr.com/7gk8nw

  32. anonymous
    • one year ago
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    http://prntscr.com/7gk9u7

  33. anonymous
    • one year ago
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    If you see the date (5/1/15) I'm not making this up.

  34. anonymous
    • one year ago
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    You just mentioned test towards the end.

  35. anonymous
    • one year ago
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    "(4 points)" ok.

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