Question 172021
To hold the temperture of a room between 18C and 21C, what Fahrenhiet tempertures must be maintained? ( Hint Fahrenheit temperture F and Celsius temperature C are related by the formulaF=9c+160/5 )
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F = (9C + 160)/5  Be careful where you put your parentheses
18C = (9*18 + 160)/5 = 322/5 = 64.4F
21C = (9*21 + 160)/5 = 349/5 = 69.8F