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mckenzieandjesus

  • one year ago

A ball is thrown into the air with an upward velocity of 36 ft/s. Its height h in feet after t seconds is given by the function mc016-1.jpg. In how many seconds does the ball reach its maximum height? Round to the nearest hundredth if necessary. What is the ball’s maximum height? 2.25 s; 10 ft 1.13 s; 32.5 ft 1.13 s; 30.25 ft 1.13 s; 70.75 ft

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  1. mckenzieandjesus
    • one year ago
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    the function is h=-16t^2+36t+10

  2. mckenzieandjesus
    • one year ago
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    @Mehek14

  3. Mehek14
    • one year ago
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    use the formula \(\sf{\dfrac{-b}{2a}}\)

  4. mckenzieandjesus
    • one year ago
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    how do i know which numbers to put into the formula?

  5. Mehek14
    • one year ago
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    \(\sf{ax^2+bx+c}\)

  6. Mehek14
    • one year ago
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    so for a, you have -16 for b, you have 36

  7. Mehek14
    • one year ago
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    \(\dfrac{-36}{2*-16}\)

  8. mckenzieandjesus
    • one year ago
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    i got 288?

  9. mckenzieandjesus
    • one year ago
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    Ok but those arent on my answer choices

  10. Mehek14
    • one year ago
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    it's actually 1.13

  11. mckenzieandjesus
    • one year ago
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    would it be 30.25?

  12. Mehek14
    • one year ago
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    yes

  13. mckenzieandjesus
    • one year ago
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    ok thank you

  14. Mehek14
    • one year ago
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    yw

  15. mckenzieandjesus
    • one year ago
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    i can't figure out a few other questions.. can u help me?

  16. Mehek14
    • one year ago
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    yea

  17. mckenzieandjesus
    • one year ago
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    Which of the quadratic functions has the narrowest graph? y=1/3 x^2 y=1/8 x^2 y=-2x^2 y=-3x^2

  18. Mehek14
    • one year ago
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    the last one

  19. mckenzieandjesus
    • one year ago
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    Ok that is what i was thinking

  20. mckenzieandjesus
    • one year ago
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    Which of the quadratic functions has the narrowest graph? 12.6 in. 6.3 in. 10.8 in. 8.9 in.

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  21. Mehek14
    • one year ago
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    Which of the quadratic functions has the narrowest graph?? I think that's for the other question

  22. mckenzieandjesus
    • one year ago
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    Find the value of x. If necessary, round to the nearest tenth.

  23. mckenzieandjesus
    • one year ago
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    oops sorry

  24. mckenzieandjesus
    • one year ago
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    dont i just times?

  25. Mehek14
    • one year ago
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    8.9 is the closest it would be 39.6 which is the closest to 40

  26. mckenzieandjesus
    • one year ago
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    are u sure it isnt 6.3 in?

  27. mckenzieandjesus
    • one year ago
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    did u times or how did u figure it out?

  28. Mehek14
    • one year ago
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    6.3*6.3 = 39.69 39.69/2=19.845

  29. Mehek14
    • one year ago
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    formula\(\dfrac{base*height}{2}\)

  30. anonymous
    • one year ago
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    mehek u got dis?

  31. anonymous
    • one year ago
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    @Mehek14

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  32. mckenzieandjesus
    • one year ago
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    so 8.9*8.9=79.21 79.21/2=39.605

  33. mckenzieandjesus
    • one year ago
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    So am i right or is it 8.9?

  34. Mehek14
    • one year ago
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    yes 8.9

  35. mckenzieandjesus
    • one year ago
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    OKay thank you!! I dont understand how to do this Write the equation in standard form. Then factor the left side of the equation. 2x2 = 28 – x

  36. mckenzieandjesus
    • one year ago
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    wouldn't it be A? (2x + 7)(x – 4) = 0 (2x + 4)(x + 7) = 0 (2x – 7)(x + 4) = 0 (2x – 4)(x + 7) = 0

  37. Mehek14
    • one year ago
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    C

  38. Mehek14
    • one year ago
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    because the solutions are x = -4 x = 7/2 = 3.500

  39. mckenzieandjesus
    • one year ago
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    ohh ok

  40. mckenzieandjesus
    • one year ago
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    I have one similar to my very fist question.. A ball is thrown into the air with an upward velocity of 48 ft/s. Its height h in feet after t seconds is given by the function h=-16t^2+48t+6 In how many seconds does the ball reach its maximum height? Round to the nearest hundredth if necessary. What is the ball’s maximum height?

  41. mckenzieandjesus
    • one year ago
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    would i do \[48/2*-16?\]

  42. Mehek14
    • one year ago
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    -48/2*-16

  43. mckenzieandjesus
    • one year ago
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    i get 384

  44. Mehek14
    • one year ago
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    -48/-32=1.5

  45. mckenzieandjesus
    • one year ago
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    what is the ft?

  46. mckenzieandjesus
    • one year ago
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    42 or 54?

  47. Mehek14
    • one year ago
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    1.5 is the time

  48. mckenzieandjesus
    • one year ago
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    Yeah I know, I just dont know the feet

  49. mckenzieandjesus
    • one year ago
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    actually it could be 114 too. 1.5 s; 42 ft 3 s; 6 ft 1.5 s; 54 ft 1.5 s; 114 ft

  50. Mehek14
    • one year ago
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    plug 1.5 for t in the equation

  51. mckenzieandjesus
    • one year ago
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    114 :)

  52. Mehek14
    • one year ago
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    so D

  53. mckenzieandjesus
    • one year ago
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    i did 4*pi*24^2 and got 7238.229474 is that right? A sports recreation company plans to manufacture a beach ball with a surface area of 7238 in.2 Find the radius of the beach ball. Use the formula A=4 pi r^2 where A is the surface area and r is the radius of the sphere. 576 in. 75 in. 24 in. 48 in

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