Answer:
6:11
Step-by-step explanation:
Answer:
tell me if am wrong.
Step-by-step explanation:
1 bucket=7.05kg
20 bucket=20*7.05=141 kg
the mass of 20 bucket is 141 kilogram(kg)
I think 14d hope this helps
Answer:
Use desmos graphing calculator plug in your equations and see which one has all points.You can use desmos for a bunch of stuff too
Step-by-step explanation:its C though
.
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.