Living Environment Regents Practice Test

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Prepare for the Living Environment Regents Test. Study using flashcards and multiple-choice questions, each with hints and thorough explanations. Ace your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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If a student counted 20 beats in 20 seconds, what was his pulse rate for one minute?

60 beats per minute
80 beats per minute
100 beats per minute
120 beats per minute

The correct answer is: 80 beats per minute

To determine the pulse rate per minute, it's important to convert the count of beats measured over a shorter time frame (20 seconds) into a per minute rate. The student counted 20 beats in 20 seconds. To find the pulse rate per minute, you can use simple multiplication. Since there are 60 seconds in a minute, you take the number of beats counted (20) and scale it up to a full minute by calculating how many 20-second intervals fit in 60 seconds. First, identify how many times 20 seconds fits into 60 seconds: 60 seconds ÷ 20 seconds = 3 This means that in one minute, the student would experience three such intervals. Therefore, you multiply the number of beats counted (20) by the number of intervals in a minute: 20 beats × 3 = 60 beats per minute. This confirms that the pulse rate, when measured over the span of one full minute, is 60 beats per minute. The other choices do not match this calculation. 80, 100, and 120 beats per minute would result from either counting more beats in the same time or miscalculating the conversion from the 20-second count to a one-minute count.