Question

A 10 gram sample of a substance that's used to detect explosives has a k-value of 0.1356.
Find the subtance's half-life, in days.

Answer 1

c'mon now

Answer 2

why don't you write what you think it is and i will check

Answer 3

basically one step calculator problem.

Answer 4

It's hard :(
i dont get it

Answer 5

Is there an equation you're supposed to use to calculate the half life?

Answer 6

you can use
\[-\ln(.5)\div k\]

Answer 7

that is all. one step. type in
\[\ln(.5)\div .1356\] and ignore the minus sign