Question 304908
a)


{{{N(t) = -3t^3 + 23t^2 + 8t }}}



{{{N(t) = -t(3t^2 - 23t - 8) }}}



{{{N(t) = -t(3t^2 + t-24t - 8) }}}



{{{N(t) = -t(t(3t + 1)-8(3t + 1)) }}}



{{{N(t) = -t(t-8)(3t+1) }}}



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b)

{{{N(t) = -t(t-8)(3t+1) }}}


{{{N(3) = -3(3-8)(3(3)+1) }}}


{{{N(3) = -3(3-8)(9+1) }}}


{{{N(3) = -3(-5)(10) }}}


{{{N(3) = 150 }}}