jessicascott120305

04.06.2020 • 

Mathematics

Need help!! A certain radioactive substance decays exponentially over time. The amount of a
sample of the substance that remains, P, after t years is given by P(t) = 10e^-47,
where P is expressed as a percentage.
a. At what time has 50% of the substance decayed? (5 marks)
b. Determine the rate of change of the function. (2 marks)
c. What is the rate of decay when 50% of the original sample has decayed? (2 marks)

show calculation pls. can you answer any of the question?

Ответ:

ariqueen

20.05.2022

Mathematics

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Hi!

Assuming the 9in is the radius, we would multiply it by 2, or add it to itself. We then get 18 in.

Hope this helps!

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