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1.)The half-life of Radium-228 is 5.75 years. What is the annual decay rate? Express the result to four decimal places.
Answer:
Express the annual decay rate as a percentage to two decimal places.
2.) The equation N(t) = 600/ 1 + 59e^−0.7t models the number of people N in a town who have heard a rumor after t days.
How many people started the rumor?
3.) The equation N(t) = 700/1 + 69e−0.8t models the number of people N in a town who have heard a rumor after t days.
To the nearest whole number, how many people will have heard the rumor after 3 days?
Sagot :
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