After 500 years one would have N nuclei of the original substance.
N = 100 * exp ( -ln(4) ) = 25
LOL.
I guess it is exp( - lamda * t)
Lamda, the decay constant is the ln(2) over the half life.
So we get exp( -ln(2)/250 * 500) or exp ( -ln(4) )
690 viewsView 1 Upvoter
Related Questions (More Answers Below)
A=p(1+i/m)^mn
A=1,000×(1+0.03÷12)^(12×3)
A=1,094.05
Answer:
The probability that the diameter falls in the interval from 2499 psi to 2510 psi is 0.00798.
Step-by-step explanation:
Let's define the random variable, 
"Comprehensive strength of concrete". We have information that 
is normally distributed with a mean of 2500 psi and a standard deviation of 50 psi (or a variance of 2500 psi). In other words, 
.
We want to know the probability of the mean of X or 
that falls in the interval ![[2499;2510]](https://tex.z-dn.net/?f=%5B2499%3B2510%5D)
. From inference theory we know that :
Now we can find the probability as follows:
Where 
, then:
Answer:
126
Step-by-step explanation:
25-2=23
2+3=5
23-5=18
7*18=126
Answer:
y=-3
Step-by-step explanation:
y+3=0
y+3-3=0-3
y=-3
