Question: Normal human body temperature is 98.6 F. A temperature x that differs from normal by at least 1.5 F is considered unhealthy. A formula that

Normal human body temperature is 98.6 F. A temperature x that differs from normal by at least 1.5 F is considered unhealthy. A formula that describes this is 

|x - 98.6| ≤ 1.5

(a) Show that a temperature of 97°F is unhealthy.
(b) Show that a temperature of 100°F is not unhealthy.

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