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39. The electric charge (in Coulombs, C) in a spherical surface leak at a rate proportional to the amount present. The initial charge is 7C and 2/5 of it leaks off in 15 minutes. After how many hours will the surface lose 80% of its original charge? 0.788 O 0.109 O 0.473 0.609

39. The electric charge (in Coulombs, C) in a spherical surface leak at a rate proportional to the amount present. The initial charge is 7C and 2/5 of it leaks off in 15 minutes. After how many hours will the surface lose 80% of its original charge? 0.788 O 0.109 O 0.473 0.609

Calculus: Early Transcendentals
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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39. The electric charge (in Coulombs, C) in a spherical surface leak at a rate proportional to the amount present. The initial charge is 7C and 2/5 of it leaks off in 15 minutes. After how many hours will the surface lose 80% of its original charge? 0.788 0.109 0.473 0.609
Transcribed Image Text:39. The electric charge (in Coulombs, C) in a spherical surface leak at a rate proportional to the amount present. The initial charge is 7C and 2/5 of it leaks off in 15 minutes. After how many hours will the surface lose 80% of its original charge? 0.788 0.109 0.473 0.609
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