E-Tech Financial indexed fund was tumbling by 10.5% (per annum) such that: where A0 is the (unknown) initially invested amount and t is the time of investment in years.   Anticipating the falling trend to last much longer, a skeptical investor decides to withdraw completely should the initial investment drop by a third. Determine how long this investor should wait before implementing his investment plan? (Round to the nearest month)

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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E-Tech Financial indexed fund was tumbling by 10.5% (per annum) such that:

where A0 is the (unknown) initially invested amount and t is the time of investment in years.
 
Anticipating the falling trend to last much longer, a skeptical investor decides to withdraw completely should the initial investment drop by a third. Determine how long this investor should wait before implementing his investment plan? (Round to the nearest month)
 
Please dont provide answer in image format thank you
0.0075
4
A(t)= A 1-.
4t
Transcribed Image Text:0.0075 4 A(t)= A 1-. 4t
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