While exercising, Julie found that her heart was beating 12 times every 5 seconds. How many times was it beating per minute (60 seconds)?
To find the number of times Julie's heart was beating per minute, we need to convert the time from seconds to minutes.
Since there are 60 seconds in a minute, we can calculate the number of times her heart was beating per minute as 12 times in 60/5 = 60/5 * 12 = <<12*60/5=144>>144. Answer: \boxed{144}.
To find out how many times Julie's heart was beating per minute, you need to convert the time interval from 5 seconds to 1 minute.
Since 1 minute is equal to 60 seconds, you can set up a proportion using the given information:
12 beats / 5 seconds = x beats / 60 seconds
To solve for x (the number of beats per minute), you can use cross-multiplication:
12 * 60 = 5 * x
Simplifying the equation:
720 = 5x
Now, divide both sides of the equation by 5 to solve for x:
720 / 5 = x
x = 144
Therefore, Julie's heart was beating 144 times per minute.
To find out how many times Julie's heart was beating per minute, we need to first calculate how many times it was beating in one second.
Julie's heart was beating 12 times every 5 seconds, so we can find the average number of beats per second by dividing 12 by 5:
12 beats / 5 seconds = 2.4 beats per second
Next, we can multiply this value by the number of seconds in a minute (60 seconds) to find the number of beats per minute:
2.4 beats per second x 60 seconds = 144 beats per minute
Therefore, Julie's heart was beating 144 times per minute.