If, when the temperature of the air is 290 Kelvin, a certain substance cools from 370 Kelvin to 330 K in 10 minutes

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter5: Exponential And Logarithmic Functions
Section: Chapter Questions
Problem 28T: The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of...
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Based from the problem attached, find the temperature after 40 minutes.

a. 285 K 

b. none of the choices

c. 280 K 

d. 290 K

e. 299 K

If, when the temperature of the air is 290 Kelvin, a certain substance cools from 370 Kelvin to 330 K in 10
minutes
Transcribed Image Text:If, when the temperature of the air is 290 Kelvin, a certain substance cools from 370 Kelvin to 330 K in 10 minutes
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