False. Sarah has not achieved homeostasis.
It is the maintenance of a relatively unchanged internal process in the body of organisms.
Since the resting heart rate for Sarah is 70 bpm, a 100 bpm is a far cry from the normal resting heart rate.
Thus, it cannot be said that Sarah has achieved homeostasis.
More on homeostasis can be found here: https://brainly.com/question/3888340
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