During a space walk , an astrounts's pulse rate first rose by 48 beats per minute , then fell 15 beats per minutes and agin rose 32 beats per minute. After the astrounts returns to the capsule , it fell again by 50 beats per minute . What is net change in the pulse rate.
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48 - 15 + 32 - 50
= 15
.
= 15
.
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