Question 1128727
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Consider this scenario: For each year t, the population of a forest of trees is represented by the function 
A(t) = 116(1.023)^t.
In a neighboring forest, the population of the same type of tree is represented by the function 
B(t) = 81(1.021)^t.

By how many trees does forest B over forest A after 20 years? 
Can someone explain how to properly set up the equation to solve it? 
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The question seems to be asking for the difference,  {{{B(20)-A(20)}}} but the functions  don't seem to fit that.  Is the question really wrong, and should instead be:
"By how many more trees will forest A have than forest B, after twenty years?"  This should be  {{{A(20)-B(20)}}}.


{{{116*1.023^20-81*1.021^20}}}


{{{60}}}