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Answer:
It is 12.9, 13.1, 13.2 C.
Step-by-step explanation:
The answer is d its decreasing
Answer:

Step-by-step explanation:
let
denote grams of
formed in
mins.
For
of
we have:
of A and
of B
Amounts of A,B remaining at any given time is expressed as:
of A and
of B
Rate at which C is formed satisfies:

Apply the initial condition,
,to the expression above

Now at
:

Substitute in X(t) to get

If it's a square all sides are 9 feet...9x9=81