Respuesta :

ferrybukantoro

Answer:

2010

Step-by-step explanation:

N(t) = 113(0.973)^t

N(t) = 50

=> 113(0.973)^t = 50

0.973^t = 50/113

= 0.44

t = ^0.973 Log 0.44 = 30

the year = 1980 + 30 = 2010

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