## Calculus (3rd Edition)

$y'' = 24t - 18$ $y''' = 24$
To calculate $y''$, first we must find $y'$ using the power rule: $y' = 3*4t^2 - 2*9t = 12t^2 - 18t$ Now, $y''$ is the derivative of $y'$, which we can once again find using the power rule: $y'' = 2*12t - 18 = 24t - 18$ To calculate $y'''$, we take the derivative of $y''$ with the power rule: $y''' = 24$