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Question 69104: Assume you have the typical heartbeat rate. If you take your pulse for 10 seconds, how many beats would you feel?
Answer by bucky(2189)   (Show Source):
You can put this solution on YOUR website! Were you told what the typical heartbeat rate is? Some sites list it as 72 beats per minute for adult males and 76 to 80 beats per minute for adult females. Another site lists the spectrum of heart beats as 60 to 110 with an average of around 80 for ages 12 through 16 and as 50 to 90 beats per minute with an average of 70 for persons greater than 16 years of age.
These rates are for persons that are calm and at rest without stress. Obviously if the person is undergoing aerobic exercises, the heartbeat rate will increase significantly.
Notice that the rates are expressed as the number of beats per minute. If you count the beats for 10 seconds, you have only counted for one-sixth of a minute. So you must multiply the number of beats in that 10 seconds by 6 times to find the number of beats per minute.
And going in the other direction, if you assume that the typical heartbeat rate is 72 beats per minute, then you can determine the number of beats in 10 seconds by dividing the 72 beats per minute by 6 because there are 6 each 10-second intervals in a minute. So the answer is 72/6 = 12 beats in 10 seconds. If you were given a different heartbeat rate, divide it by 6 to find how many beats you would count in 10 seconds.
For practice you should assume different average heartbeat rates and determine how many beats would occur in 10 seconds. For example, if the average heartbeat rate for a teenager is 80 beats per minute, how many beats would be counted in 10 seconds? The answer is about 13 beats in 10 seconds, but how do you determine that?
Or suppose that a person has a heartbeat rate of 68 beats per minute. How many beats would you count in 15 seconds? Since there are 4 periods of 15 seconds each in a minute, each period would get one-fourth of the 68 beats that occur in an entire minute. So the answer can be obtained by dividing 68 by 4.
Nurses often count the number of beats in 15 seconds and multiply that number by 4 to find the heartbeat count in beats per minute for a patient.
Hope this helps you to understand the problem a little better.
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