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Dead leaves accumulate on the ground in a forest at a rate of 39 grams per square centimeter per year. At the same time, these leaves decompose at a continuous rate of 36 percent per year.

A. Write an equation for the total quantity Q of dead leaves (per square centimeter) at time t :

dQ/dt=?

B. If initially there were no leaves, what is an expression for the number of leaves after time t?

Q=?

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