Answer:
For every 4 cats there are 5 dogs, the total number of animals is 24. If we were to do the math we would see that all you need to do is add the amounts to equal the total.
Step-by-step explanation:
When you go to add/ adjust the amount or ratio make sure it is the same equation for both cats as it is dogs
Answer:

Step-by-step explanation:
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Her statue is 20cm because 5ftx12cm is 60ft. therefore the statue should be 60ft in total. 60÷4=20 therefore her drawing is 20cm tall.
It is systematic because they are going every tenth person, in a random manner.