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Mathematics 21 Online
OpenStudy (anonymous):

So, a person has 100 heartbeats in 1.5 minutes. How many heartbeats does he have in 1 minute?

OpenStudy (agent0smith):

Let's say they had 200 heartbeats in 2 minutes, how many do they have in 1 minute?

OpenStudy (anonymous):

100hb/1.5min ?hb/1min 1min times 100hb divided by 1.5min equals 66.666666667

OpenStudy (anonymous):

the .66's don't end

OpenStudy (anonymous):

66.6666666667

OpenStudy (anonymous):

that was my estimation

OpenStudy (agent0smith):

There's no need for so many decimals. 66.7 or 67 heartbeats per minute will do.

OpenStudy (anonymous):

If this dude has 100 heartbeats per 1.5 minute, first find out how much he has per second. For this, convert 1.5 to seconds. That'll be 90 seconds(1 and a half minutes = 60 seconds+30 seconds). Now, find out how many heartbeats he has in one second. Do this by dividing 100(number of heartbeats) by 90(seconds). That'll be around 1.11(recurring). now multiply this by 60(seconds), which is nothing but one minute, to get your answer. That'll be 1.11*60 = 66.66 beats per minute. Voila!

OpenStudy (anonymous):

set up a proportion of heartbeats over time equals heartbeats over time. for any missing value u would use x. cross multiply and get the missing number of heartbeats. cheers goodnight

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