Question

Question #ea645

Answer 1

69.3 min

Explanation:

`sf(N_t=N_0e^(-lambda"t"))`

`:.` `sf(lnN_t=lnN_0-lambda"t")`

`:.` `sf(ln[(N_t)/(N_0)]=-lambda"t")`

`sf(ln[(59)/(100)]=-lambdaxx51.0)`

`sf(lambda=0.01color(white)(x)"min"^(-1))`

`sf(t_(1/2)=0.693/lambda=0.693/0.01=69.3color(white)(x)"min")`