50 POINTS! , PLEASE HELP ME MATH PEOPLE.
1 answer:
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Answer:
The mass of the radioactive sample after 40 minutes is 12.8 g.
Step-by-step explanation:
The mass of the sample can be found by using the exponential decay equation:
Where:
N(t): is the amount of the sample at time t =?
N₀: is the initial quantity of the sample = 120 g
t = 40 min
λ: is the decay constant = 0.056 min⁻¹
Hence, the mass of the sample after 40 min is:
Therefore, the mass of the radioactive sample after 40 minutes is 12.8 g.
I hope it helps you!
Answer:
<h2>A</h2>Step-by-step explanation:
la recta:
(*)
P=(xo,yo)
substituindo:
Seja P=A=(xo=1,yo=3), utilizando a formula (*)