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Asked by  | 5th Oct, 2008, 08:08: PM

Expert Answer:

it grew 100cm in the first year

it grew 95 cm in the second year

it grew 90cm in the third year

a = 100 and d= -5

an= 0 = 100+(n-1) (-5)

0 = 100-5n +5

105=5n

n=21

in 21 years  it will  have ceased growing . 

 

 

Answered by  | 5th Oct, 2008, 10:32: PM

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