Growth of wood

The annual growth of wood in the forest is estimated at 2%. In how many years will make the forest volume double?

Correct answer:

n =  35

Step-by-step explanation:

q=100%+2%=1+1002=1.02  qn = 2 n ln q = ln 2  n=ln2/lnq=ln2/ln1.02=35

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