17) While exercising, Julie found that her heart was beating 12 times every 5 seconds. How many times was it beating per minute?
So does it start out like this? 12/5=x/60
yes
12/5=x12/x12=144/60
Multiply both. 144 bpm
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So is the answer 144?
12/5=x/60
5x/5=720/5
x=450 beats per minute