High School

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Calculate the number of beats per day:

1. Number of beats in 15 seconds = ___

2. Multiply this number by 4 to find how many beats your heart makes in one minute.
- Example: Number of beats in 15 seconds ___ x 4 = ___ beats per minute

3. Multiply this by 60 to find how many beats your heart makes in one hour.
- Example: Number of beats in 1 minute = ___ x 60 = ___ beats per hour

4. Multiply this by 24 to find how many beats your heart makes in one day.
- Example: Number of beats in 1 hour = ___ x 24 = ___ beats per day

Choose the correct option:

A. 90, 3600, 86,400
B. 80, 3200, 76,800
C. 100, 4000, 96,000
D. 70, 2800, 67,200

Answer :

Final answer:

The calculation steps to find the number of heartbeats per day are explained, but none of the provided options (A, B, C, or D) give the correct number of beats per day.

Explanation:

The question asks to calculate the number of heartbeats per day given the number of beats in 15 seconds. The calculation follows a series of steps multiplying by 4 to get beats per minute, by 60 to get beats per hour, and by 24 to get beats per day. Using this method:

  • For option A: 90 beats in 15 seconds equals 90 × 4 = 360 beats per minute. Then, 360 × 60 = 21,600 beats per hour and 21,600 × 24 = 518,400 beats per day.
  • For option B: 80 beats in 15 seconds equals 80 × 4 = 320 beats per minute. Then, 320 × 60 = 19,200 beats per hour and 19,200 × 24 = 460,800 beats per day.
  • For option C: 100 beats in 15 seconds equals 100 × 4 = 400 beats per minute. Then, 400 × 60 = 24,000 beats per hour and 24,000 × 24 = 576,000 beats per day.
  • For option D: 70 beats in 15 seconds equals 70 × 4 = 280 beats per minute. Then, 280 × 60 = 16,800 beats per hour and 16,800 × 24 = 403,200 beats per day.

None of the provided options (A, B, C, or D) correctly calculate the number of beats per day based on the provided 15 second rates.

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