Mark M. answered • 04/30/21

Mathematics Teacher - NCLB Highly Qualified

50 = 400e^{6k}

0.125 = e^{6k}

ln 0.125 = 6k

-2.07944 ≈ 6k

-0.34657 ≈ k

0.5 = e^{-0.34657t}

ln 0.5 = -0.34657t

-0.6931 ≈ -0.3457t

2.0051 ≈ t

David H.

asked • 04/30/21
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Mark M. answered • 04/30/21

Tutor

5.0
(243)
Mathematics Teacher - NCLB Highly Qualified

50 = 400e^{6k}

0.125 = e^{6k}

ln 0.125 = 6k

-2.07944 ≈ 6k

-0.34657 ≈ k

0.5 = e^{-0.34657t}

ln 0.5 = -0.34657t

-0.6931 ≈ -0.3457t

2.0051 ≈ t

Mike D. answered • 04/30/21

Tutor

4.9
(82)
Effective, patient, experienced math tutor who can help you succeed

After every half life, mass is halved

So after 1 half life we have 200g, after 2 half lives 100g, after 3 half lives 50g

So 3 half lives = 6 days

So 1 half life = 2 days.

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