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26 August, 19:37

For a scientific Experiment, A physicist must make sure that the temperature of a metal at 0°C gets to no colder than - 80°C. the physicist changes the metals temperature at a steady rate of - 4°C per hour. Let t represent the temperature in degrees Celsius. Write an inequality. use the fact that the rate of change in temperature times the number of hours equals the final temperature.

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  1. 26 August, 19:41
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    - 4 h ≥ - 80

    Step-by-step explanation:

    The temperature of the metal is 0°C and the gets to no colder than - 80°C.

    If the temperature is decreasing at the rate of - 4°C per hour, then the temperature after h hours will be t = 0 + ( - 4) h which will not be less than - 80°C.

    So the inequality that models the situation is 0 + ( - 4) h ≥ - 80

    ⇒ - 4 h ≥ - 80 (Answer)
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