pre calc
posted by andi
A 50 gram sample of radioactive strontium will decay to 32 grams in 18 years.
a. Find an equation that will model how much of our sample M will remain after t years.
Respond to this Question
Similar Questions

chemistry
How long will it take for 25% of the C14 atoms in a sample of C14 to decay? 
calculus
The rate at which an amount of a radioactive substance decays is modeled by the differential equation dA/dt = kA, where A is the mass in grams, t is the time in years, and k is a constant. Answer the following. a) If a 100gram sample … 
chem
Radioactive substances decay by firstorder kinetics. How many years would be required for a sample containing strontium90 to decrease to 58.32% of its initial activity? 
SCIENCE
We did a radioactive decay and half life lab with m&ms and I do not understand these conclusion questions: 1. how many half lives would it take for 500 nuclei to decay to 6.25% of the original number of nuclei? 
Math
The quantity Q of radioactive carbon remaining in a 300  gram wood sample at time t is given by the expression Q(t) = 300 e^{ 0.000324*t}. How much radioactive carbon remains in the sample after (a) 200 years, (b) 50000 years, (c) … 
PreCalc
Tritium, a radioactive isotope of hydrogen, has a halflife of 12.4 years. Of an initial sample of 69 grams, how much will remain after 75 years? 
Pre Calculus
Tritium, a radioactive isotope of hydrogen, has a halflife of 12.4 years. Of an initial sample of 69 grams, how much will remain after 75 years? 
Science
An element has a halflife of 30 years. If 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain? 
math
An element has a halflife of 30 years. If 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain? 
Math
The element strontium90 is radioactive. The percent of strontium 90, A(t), left in a sample can be modelled by the halflife function A(t) = A0 (1/2)^t/29, where t represents the time, in years, after the initial time, and A0 represents …