Quote:
Originally Posted by Chappy
S0(x) = (k^2  x)^0.5/k
What is S30(x)?
I thought it was [(k^2  x)/(k^2  30)]^0.5 but don't think this is correct.
Is it [(k^2  x  30)/(k^2  30)]^0.5?

Express S30(x) using S0(30 + x) and S0(30)
Future lifetime of a newborn is 30 + x, not x, so your 2nd expression is correct.