SOLUTION: please help me solve for r :{{{P(2)= 2500/ (1+(21.73)e^(-2r))}}}

Algebra ->  Exponents -> SOLUTION: please help me solve for r :{{{P(2)= 2500/ (1+(21.73)e^(-2r))}}}      Log On


   

Question 756787: please help me solve for r :P%282%29=+2500%2F+%281%2B%2821.73%29e%5E%28-2r%29%29
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
Without the value of P(2) we can only say...
P%282%29=+2500%2F+%281%2B%2821.73%29e%5E%28-2r%29%29

1%2B%2821.73%29e%5E%28-2r%29=+2500%2FP%282%29+

%2821.73%29e%5E%28-2r%29=+2500%2FP%282%29-1+


e%5E%28-2r%29=+%282500%2FP%282%29-1%29%2F21.73+

ln%28e%5E%28-2r%29%29=+ln%28%282500%2FP%282%29-1%29%2F21.73%29+

r=+%28-1%2F2%29ln%28%282500%2FP%282%29-1%29%2F21.73%29+