Question

Anna is a microbiology student she was doing a research on optimem temperature for the survival of different strains of bacteria.some of her experiaments require that room temperature be lowered from 40degree at the rate of 5 degreeC every hour 1) what will be the room temperature 10 hours after the process begins 2) after how many hours the temperature will be (-20)

Answer 1

Step-by-step explanation:

-10 degree temperature will be after 10 hours and after 12 hours temperature will be - 20

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Answer 2

Step-by-step explanation:

1) room temperature 10 hours after the process begins = 40 - 5×10 = 40 - 50 = -10 degreeC

2) the number of hours after which the temperature will be (-20) = {40 - (-20)}/5 = {40 + 20}/5 = 60/5 = 12 hours