SOLUTION: 1.Goreliebium 2ooo has a half-life of 4 weeks.If there are 100 units of goreliebium 2000 in the begining,
a.how much will be left in 3 weeks?
b.how much will be left in 7 weeks?
Algebra.Com
Question 90691: 1.Goreliebium 2ooo has a half-life of 4 weeks.If there are 100 units of goreliebium 2000 in the begining,
a.how much will be left in 3 weeks?
b.how much will be left in 7 weeks?
2. The average height of a longleaf pine as a function of its age is given by
h(t)=120(1-e^-.o4t). How tall is a typical tree after 30 years?After 100 yrs.?After 150 yrs.?
not from my math 161 book. instructor came up with same.
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
half-life means that half of the original material will be gone in the stated time
the formula is a=A((1/2)^(t/h)) where a is the amount remaining, A is the starting amount, t is the time , h is the half-life
a) a=100(.5^(3/4))=100(.595)=59.5
b) a=100(.5^(7/4))=100(.297)=29.7
2)a) h=120(1-e^((-.04)30))=120(1-e^(-1.2))=120(1-.301)=83.9
2)b) h=120(1-e^((-.04)100))=120(1-e^(-4))=120(1-.0183)=117.8
2)c) h=120(1-e^((-.04)150)=120(1-e^(-6))=120(1-.00248)=119.7
RELATED QUESTIONS
This is a homework assignment not in the book. Ra226 has a half-life of1600 years. How... (answered by scott8148)
Suppose that a certain radioactive substance has a half-life of 20 years. If there are... (answered by ankor@dixie-net.com)
the half life of radioactive potassium is 1.3 billion years. If ten grams are present... (answered by nyc_function)
The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has... (answered by jorel1380)
If a radioactive substance has a half-life of 10 days, in how many days will 1/8 of the... (answered by Alan3354)
The Radioactive isotope technetium 99m (99mTc) is used in imaging the brain. the isotope... (answered by htmentor)
The radioactive isotope technetium 99m is used in imaging the brain. The isotope has a... (answered by greenestamps)
This is a word problem relating to exponential functions:
The half-life of a substance (answered by ankor@dixie-net.com)
suppose that a certain radioactive substance has a half life of 20 years. if there is... (answered by stanbon,solver91311)