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anonymous

  • one year ago

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  1. anonymous
    • one year ago
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    @phi @ganeshie8 @dan815 @DanJS @Hero @Prosper2win

  2. anonymous
    • one year ago
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    @welshfella @Elsa213 @RedNeckOutLaw @taramgrant0543664 @yomamabf @uybuyvf @OGKeith

  3. phi
    • one year ago
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    Find the area of the circle of spilled paint as a function of time, or A[r(t)]. to do that , start with the formula for the area \[ A = \pi \ r^2\] now erase the r and put in its place (3t) can you do that ?

  4. anonymous
    • one year ago
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    A=π3t^2

  5. anonymous
    • one year ago
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    Part A: π(3t)^2 (3.14)(9)(t^2) 28.26t^2 Part B: 28.26 x 10^2=2826 I got this but i don't know if its right

  6. phi
    • one year ago
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    almost. remember that "3t" is r so you should put in parens (3t)^2 (which means 3*t*3*t or 9*t*t or 9*t^2)

  7. anonymous
    • one year ago
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    so Part A: π(3t)^2 (3.14)(9t^2) 28.26t^2

  8. phi
    • one year ago
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    yes. all of that looks ok but they may want you to leave it as pi in part A (that is more accurate way to show the formula) so \[ A(t)= 9 \pi t^2 \]

  9. phi
    • one year ago
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    in part B they say you can use 3.14 , so now you can do A(10)= 9*3.14*10^2 which will simplify to your answer 2826

  10. anonymous
    • one year ago
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    Oh ok so i will just write it both ways

  11. anonymous
    • one year ago
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    Thank you so much!! :)

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spraguer (Moderator)
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