The body mass of yearling bighorn sheep on Ram Mountain in Alberta, Canada, can be estimated by
M(t) = 27.5 + 0.3t - 0.001t^2
where M(t) is measured in kilograms and t is days since May 25.
A) Find the average rate of change of the weight of a bighorn yearling between 105 and 115 days past May 25
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