The temperature reading from a thermocouple placed in a constant-temperature medium is normally distributed with mean μ, the actual temperature of the medium, and standard deviation σ. What would the value of σ have to be to ensure that 88.12% of all readings are within 0.20O of μ?

the red lines denote the population of the bacteria after 35 hours. that would be 2,409.24. the y-intercept is the blue line which is 800 because that is the starting point. the equation used to make the graph is 800(1.032)^h, where h is the number of hours.

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she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

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70 years.

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