Respuesta :

loumast
first you want to know what the ratios are. in order they are heartbeats per second, students per instructors and meters per second. when you have a ratio like this the per means divided by, so just put the numbers in their appropriate place in a division problem. for the first its 162/60 to get 2.7 heartbeats per second. can you handle the other two?
meghanbf

Ratios are fractions.  You can set each of these problems up as the first thing over the second thing, and set them equal to x over 1.

5. 162/60=x/1

    x=2.7

2.7 heartbeats per second


6. 216/12=x/1

    x=18

18 diving students per instructor


7. 630/18=x/1

   x=35

35 meters per second.


Hope this helps!!

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