Question 1151827
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There are several ways to get the answer.


1.  First calculate deceleration  a = {{{29/7.2}}} = 4.027778 m/s^2.

    Next calculate the distance  d = {{{(at^2)/2}}} = {{{(4.02778*7.20^2)/2}}} = 104.4 meters.



2.  Or do the calculation, using average speed   {{{V[average]}}} = {{{29.0/2}}} = 14.5 m/s.

    Then the distance to the rest is  d = {{{V[average]*t}}} = 14.5*7.20 = 104.4 meters  --- the same answer.
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If this problem came from Physics / Mechanics, then it should be explained in these courses.