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Strontium-90 has a half-life of 28 days. (a) A sample has initial mass of 50 mg. Find a formula for the mass remaining after t days, y(t). y(t) 50 -2 (*)- (b) Find the mass (in mg) remaining after 15 days. (Round your answer to one decimal place.) 34.5 mg (c) How long does it take (in days) the sample to decay to a mass of 2 mg? (Round your answer to the nearest day.) 130 days

Strontium-90 has a half-life of 28 days. (a) A sample has initial mass of 50 mg. Find a formula for the mass remaining after t days, y(t). y(t) 50 -2 (*)- (b) Find the mass (in mg) remaining after 15 days. (Round your answer to one decimal place.) 34.5 mg (c) How long does it take (in days) the sample to decay to a mass of 2 mg? (Round your answer to the nearest day.) 130 days

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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Strontium-90 has a half-life of 28 days. (a) A sample has initial mass of 50 mg. Find a formula for the mass remaining after t days, y(t). y(t) = 50 2 (b) Find the mass (in mg) remaining after 15 days. (Round your answer to one decimal place.) 34.5 mg (c) How long does it take (in days) the sample to decay to a mass of 2 mg? (Round your answer to the nearest day.) 130 days (d) Sketch the graph of the mass function. y y y 25 25 50 20 20 40 15 15 30 10 10 20 5 10 50 100 150 200 250 300 20 40 60 80 100 120 140 20 40 60 80 100 120 140
Transcribed Image Text:Strontium-90 has a half-life of 28 days. (a) A sample has initial mass of 50 mg. Find a formula for the mass remaining after t days, y(t). y(t) = 50 2 (b) Find the mass (in mg) remaining after 15 days. (Round your answer to one decimal place.) 34.5 mg (c) How long does it take (in days) the sample to decay to a mass of 2 mg? (Round your answer to the nearest day.) 130 days (d) Sketch the graph of the mass function. y y y 25 25 50 20 20 40 15 15 30 10 10 20 5 10 50 100 150 200 250 300 20 40 60 80 100 120 140 20 40 60 80 100 120 140
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