i'm a sophomore in connections, i'd recommend checking on jishka.com they have a large range of questions and answers from our school.
the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have
(1/2) =) take the ln of both sides
ln (1/2) = ) and we can write
ln(1/2) = ) lne and lne = 1 so we have
ln(1/2) = -.1092t divide both sides by -.1092
t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)