Answer
$x=45.0m$
Work Step by Step
We know the follwing equation:
$x=v_{0}t+\frac{1}{2}at^{2}$
We plug in the known values to obtain:
$=(0m/s)(5.4s)+\frac{1}{2}(3.09m/s^{2})(5.4s)^{2}=45.0m$
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