Question

Can someone help me with this plz

Answer 1

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?

Answer 2

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!!