SOLUTION: A radioactive substance decays from 20 pounds to 19.9 pounds in 25 years. approximate the half life of the substance,
Algebra.Com
Question 325438: A radioactive substance decays from 20 pounds to 19.9 pounds in 25 years. approximate the half life of the substance,
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Find k.
.
.
.
Now find the half life.
The half life is 1728.5 years.
RELATED QUESTIONS
Find the half life of a radioactive substance that decays by 20% in 10... (answered by stanbon)
Find the half-life of a radioactive substance that decays by 2% in 9... (answered by ankor@dixie-net.com)
in 10 years, 25% of a radioactive substance decays. What is its... (answered by ankor@dixie-net.com)
A certain radioactive substance decays according to the formula q(t)= q0e^-.0063t. where... (answered by ankor@dixie-net.com)
A substance decays exponentially. If the 80 ounces of the substance decays to 9 ounces in (answered by josgarithmetic)
Find the half-life of a radioactive substance if 240 grams of the substance decays to 180 (answered by Edwin McCravy)
A certain radioactive substance decays exponentially and has a half-life of 78 years.... (answered by stanbon)
Use Q(t)=Q sub 0 e^kt to solve: Find the half-life of a radioactive substance if 240... (answered by ewatrrr)
A radioactive substance is produced from nuclear fallout. If 250g of this substance... (answered by josgarithmetic,greenestamps,math_tutor2020)