/while exercizing julie found that her heart was beating 2 times every 5 seconds how many times was it beating per minute

5 seconds into 60 seconds goes 12 times, so mulitply the 2 by 12 and you get 24.
By the way, Julie is very nearly dead with a heart rate that slow!

It is beating 24 times per minute. To figure out the rate for a minute, you must figure out how many times 5 seconds goes into 60 seconds - 12 times. Then, you must take the number 2 and multiply it by 12 as well since you're trying to find the rate per minute (60 seconds). You would then get 24. Her heart beats 24 times per minute.