A certain substance has a half-life of 16 hours. A scientist initially has 100 mg of this substance. You must show your work for all parts for credit. a) Write the exponential equation that give the amount of substance in mg, A(t), as a function of t hours. b) When will there be 78mg left? c) How much is left after 200 hours

A certain substance has a half-life of 16 hours. A scientist initially has 100 mg of this substance. You must show your work for all parts for credit. a) Write the exponential equation that give the amount of substance in mg, A(t), as a function of t hours. b) When will there be 78mg left? c) How much is left after 200 hours

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter6: Exponential And Logarithmic Functions

Section6.1: Exponential Functions

Problem 62SE: A scientist begins with 100 milligrams of aradioactive substance that decays exponentially. After 35...

See similar textbooks

Similar questions

A radiation safety officer is working with 112 grams of a radioactive substance. After 17 days, thesample has decayed to 80 grams. Rounding to fivesignificant digits, write an exponential equationrepresenting this situation. To the nearest day, whatis the half-life of this substance?
An investment account was opened with aninitial deposit of 9,600 and earns 7.4 interest,compounded continuously. How much will theaccount be worth after 15 years?
The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of radioactive actinium will remain after 19 years?
Given a formula for an exponential function, is itpossible to determine whether the function grows ordecays exponentiallyjust by looking at the formula?Explain.
The half-life of a radioactive material is about 34.2 years. How much of the material is left after 20 years?
How can an exponential equation be solved?
A scientist begins with 100 milligrams of aradioactive substance that decays exponentially. After 35 hours, 50 mg of the substance remains. How manymilligrams will remain after 54 hours?
What is the difference between the equation for exponential growth versus the equation for exponential decay?