Algebra
posted by Jessica .
Andrew measures the amount of a very unstable substance to be 100 moles. The halflife of this substance is 3 days (after 3 days, half is gone).
Write an exponential function that models this situation where y is the amount of substance and x is time in days.
Thank you for reading!
Respond to this Question
Similar Questions

Physics
Suppose a hypothetical radioactive nucleus (Hy) has a halflife of 10 days. If we have 80 gms of the substance at the start of an experiment, how many gms of the substance will remain undecayed after 30 days 
calculus
assume the halflife of the substance is 31 days and the initial amount is 183.9 grams. (a) Fill in the right hand side of the following equation which expresses the amount A of the substance as a function of time t (the coefficient … 
Math/Calculus
After 5 days, a particular radioactive substance decays to 37% of its original amount. Find the half life of this substance. Is this right? 
Science
Radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is A(t)=100(1.6)^(t). a) Determine the function A’, which represent the rate of decay of the substance. b) … 
Physical Science Help Please!
Suppose that you are given a 100 gram sample of a radioactive substance with a halflife of 32 days. How many grams will be left after 192 days? 
algebra
Andrew measures they amount of a very unstable substance to be 100 moles. the half life of this substance is 3 days(after 3 days, half is gone). write an exponential function that models this situation where Y is the amount of substance … 
Algebra 2 help...
A half life of a certain radioactive is 36 days. An initial amount of the material has a mass of 487 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 5 days. … 
Calculus
a certain radioactive substance is decaying so that at time t, measured in years, the amount of the substance, in grams, is given by the function f(t)=3e^3t. What is the rate of decay of the substance after half a year: I first found … 
Math
I need help in algebra 1. I have 4 questions, I already answered 3 of them, but I need help with the other Andrew measures the amount of a very unstable substance to be 100 moles. The halflife of this substance is 3 days (after 3 … 
Exponential Modeling
The halflife of a radioactive substance is one day, meaning that every day half of the substance has decayed. Suppose you have 100 grams of this substance. How many grams of the substance would be left after a week?