How long will it take for $400 to grow to $1000 at the interest rates specified?
Please show all work.© BrainMass Inc. brainmass.com March 4, 2021, 6:22 pm ad1c9bdddf
One period gives the principal multiplied by the factor (1 + x%/100) for brevity x%/100 =x where x is the correspondent fractional percent.
In the next period the new principle is P(1 +x) and at the end of the period we obtain this multiplied again by (1+x) So for n periods the new principle returned is P(1+x)^n
So now we want $400 to return as $1000 in n ...
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