Answer:
138 bpm.
Step-by-step explanation:
You are calculating beats per minute (bpm). In this case, Scott counted 23 beats in 10 seconds. There are 60 seconds in a minute, so multiply by 6:
(23 beats/10 seconds) x (6/6) = (138 beats/60 seconds).
Scotts approximate heart rate is 138 bpm.
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