Question

HELP PLEASE? WILL MEDAL
The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49
kg. Write an exponential function that models the decay of this material. Find how much radioactive material
remains after 8 days. Round your answer to the nearest thousandth.

Answer 1

i can help.just wait:)

Answer 2

Ok thank you

Answer 3

I can help hold on

Answer 4

does that help:)

Answer 5

The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 8 days. Round your answer to the nearest thousandth. y = 49(1/2)42x;0 kg y = 1/2(1/49)1/42x;0.238 kg y = 49(1/2)1/42x;42.940 kg y = 2(1/49)1/42x;0.953 kg Use the graph of y = ex to evaluate e1.6 to four decimal places. 4.3493 4.9530 0.2019 2.7183

Answer 6

these are the options given
y = 0 kg
y = ; 0.238 kg
y = ; 42.940 kg
y = ; 0.953 kg

Answer 7

I think that, if m(t) is the mass of your radioactive sample at time t, and m_0 is the mass of your radioactive sample at initial time, then we have:
\[m(t)=m _{0}e ^{-t/\tau} \]
where tau=42/ln2
m_0=49

Answer 8

I think m(t)=42.940 Kg, so the third option

Answer 9

sorry: m(8)=42.942 Kg @camzzzie

Answer 10

answer was c