Rebecca M.

asked • 10/07/19

Find the half-life (in hours) of a radioactive substance that is reduced by 40 percent in 35 hours

2 Answers By Expert Tutors

By:

Rebecca M.

would the answer for k be -0.0146?
Report

10/07/19

Rebecca M.

*Would the answer for k be -0.0146?
Report

10/07/19

Lauren B.

tutor
Yes!
Report

10/07/19

Rebecca M.

so to find my answer would I just plug in that number to my first equation?
Report

10/07/19

Rebecca M.

and where are you getting the 0.5 from?
Report

10/07/19

Lauren B.

tutor
Half life is when the amount remaining is half (0.5) of the original amount.
Report

10/07/19

Lauren B.

tutor
What we want is the time (t) when half (0.5) of the sample has decayed.
Report

10/07/19

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.