Answer:
We can use the sample about 42 days.
Step-by-step explanation:
Decay Equation:



Integrating both sides


When t=0, N=
= initial amount




.......(1)
.........(2)
Logarithm:
130 days is the half-life of the given radioactive element.
For half life,
,
days.
we plug all values in equation (1)






We need to find the time when the sample remains 80% of its original.







We can use the sample about 42 days.
Answer:
I believe that corect answer is x=2
Step-by-step explanation:
ASAP means as soon as possible. Just kidding. Okay the answer is A. 180-29-29=122.
Answer:
Step-by-step explanation:
Yes. The zeroes of a graph are the values of x where the graph touches (or crosses) the x-axis.
Answer:
350 MPH
Step-by-step explanation:
600-200+50-100=350