So, we already know that one hive has a weight of 11.607kg and .204kg is add each week, so we add on .204kg times, w, representing weeks onto 11.607kg and our t is our total of weight of a hive with respect to weeks

So in this case our w is 7.5 weeks and now we evaluate t

Solve

Answer:
Hive's weight will increase by 1.53kg in 7.5 weeks to 13.137kg