An unknown radioactive element decays into non-radioactive substances. In 1000 days the radioactivity of a sample decreases by 68 percent. (a) What is the half-life of the element? half-life: (days) (b) How long will it take for a sample of 100 mg to decay to 99 mg? time needed: (days)

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter4: Exponential And Logarithmic Functions
Section4.6: Modeling With Exponential Functions
Problem 20E
icon
Related questions
Question
Question 8
An unknown radioactive element decays into non-radioactive substances. In 1000 days the radioactivity of
a sample decreases by 68 percent.
(a) What is the half-life of the element?
(days)
half-life:
(b) How long will it take for a sample of 100 mg to decay to 99 mg?
(days)
time needed:
Question Help: D Video
Submit Question
esc
80
000
F2
F3
F4
F5
F6
@
#
%
2
3
4
5
6
Transcribed Image Text:Question 8 An unknown radioactive element decays into non-radioactive substances. In 1000 days the radioactivity of a sample decreases by 68 percent. (a) What is the half-life of the element? (days) half-life: (b) How long will it take for a sample of 100 mg to decay to 99 mg? (days) time needed: Question Help: D Video Submit Question esc 80 000 F2 F3 F4 F5 F6 @ # % 2 3 4 5 6
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps

Blurred answer
Recommended textbooks for you
Algebra and Trigonometry (MindTap Course List)
Algebra and Trigonometry (MindTap Course List)
Algebra
ISBN:
9781305071742
Author:
James Stewart, Lothar Redlin, Saleem Watson
Publisher:
Cengage Learning
College Algebra
College Algebra
Algebra
ISBN:
9781305115545
Author:
James Stewart, Lothar Redlin, Saleem Watson
Publisher:
Cengage Learning
Functions and Change: A Modeling Approach to Coll…
Functions and Change: A Modeling Approach to Coll…
Algebra
ISBN:
9781337111348
Author:
Bruce Crauder, Benny Evans, Alan Noell
Publisher:
Cengage Learning
Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
Trigonometry (MindTap Course List)
Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781337278461
Author:
Ron Larson
Publisher:
Cengage Learning
College Algebra
College Algebra
Algebra
ISBN:
9781337282291
Author:
Ron Larson
Publisher:
Cengage Learning