On the football field, there are 22 players at a time: 1/2 offense & 1/2 defense. At a TCU vs. Baylor game, the Baylor defen
se is using a "Nickel' defense which comprises of 4 linemen, 2 linebackers, 2 cornerbacks, a nickelback, and 2 safeties. For a player's position, find P(linebacker/defense).
A) 2/11
B) 3/22
C) 5/11
D) 1/2
A) 2/11
B) 3/22
C) 5/11
D) 1/2
1 answer:
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If the radio active isotope has the half life of 24100 years, then the initial quantity is 2.16 grams
The half life in years = 24100
Consider the quantity of the radio active isotope remaining
y =
When t = 1000 the y = 1.2
y = C/2 when t = 1599
Substitute the values in the equation
C/2 =
Cancel the C in both side
1/2 =
Here we have to apply ln to eliminate the e terms
ln (1/2) = 24100k
k = ln(1/2) / 24100
k = -2.87× 10^-5
To find the initial value we have to substitute the value of k and y in the equation
1.2 = Ce^{1000 × -2.87× 10^-5}
C = 1.2 / e^(-0.0287)
C = 2.16 gram
Hence, the initial quantity of the radioactive isotope is 2.16 gram
Learn more about half life here
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