Population growth doubt

[L14]

I'm trying to do this way
120=100(1+r)^10
But from this step, how do I find 'r'?
Pls do help.

[ManpreetDeconomist]

its less than 2%.. follows simply from this logic : Exponential growth is much faster than Simple linear growth (agreed?) ... and here in this question the average rate of growth would be 2% p.a (not exponential).. so therefore exponential growth rate would be less than 2% ofcourse.... I know its a JNU question and ans is less than 2%.

[Halflife]

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[Halflife]

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