Final answer:
The original question about Double Time run cadence is incomplete, but to find the time per beat for a heart rate of 150 beats per minute, one would divide 60 by the number of beats per minute. This results in 0.4 seconds per beat.
Step-by-step explanation:
The subject of this question pertains to run cadence, which is often discussed in the context of health and fitness. Although the original question regarding the Double Time run cadence is incomplete, an analogy is drawn from the provided context of heart rate during exercise. If one's heart rate is 150 beats per minute during strenuous exercise, the time per beat in seconds can be calculated by dividing 60 seconds (which is the number of seconds in a minute) by 150. This gives us 0.4 seconds per beat as indicated in the supplied reference information. Applying similar mathematical steps could answer the original question regarding the run cadence, provided the necessary information on the number of steps per minute is available.