Answer
Please see the work below.
Work Step by Step
We know that the position of the object is
$r=(3.2t+1.8t^2)i+(1.7t-2.4t^2)j$
and the velocity of the object is
$v=(3.2+3.6t)i+(1.7-4.8t)j$
Now, the acceleration of the object is
$a=(3.6)i+(-4.8)j$
