To determine how many times Pat's heart beats in 4 seconds given that his normal pulse rate is 80 beats per minute, follow these steps:
1. Understand the Relationship:
- Pat's pulse rate is given in beats per minute (bpm), and we need to find out the number of beats in 4 seconds.
2. Convert Seconds to Minutes:
- Since pulse rate is given in minutes, first convert the 4 seconds into a fraction of a minute.
- There are 60 seconds in one minute.
- Therefore, 4 seconds is [tex]\( \frac{4}{60} \)[/tex] minutes.
3. Calculate the Fraction in Simplest Form:
- Simplify [tex]\( \frac{4}{60} \)[/tex]:
[tex]\[
\frac{4}{60} = \frac{1}{15}
\][/tex]
4. Determine the Number of Beats:
- Now, use the pulse rate to calculate the number of beats in [tex]\( \frac{1}{15} \)[/tex] of a minute.
- Pat's pulse rate is 80 beats per minute, so we multiply the pulse rate by the fraction of the minute:
[tex]\[
\text{Number of beats} = 80 \times \frac{1}{15}
\][/tex]
5. Perform the Multiplication:
- Perform the multiplication:
[tex]\[
80 \times \frac{1}{15} = \frac{80}{15}
\][/tex]
6. Simplify the Result:
- Divide the numerator by the denominator:
[tex]\[
\frac{80}{15} \approx 5.3333
\][/tex]
Therefore, Pat's heart beats approximately 5.33 times in 4 seconds.
