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Akimi4 [234]
3 years ago
13

If 82 out of 100 cockroaches are immune to a pesticide after repeated use in an area, how many would be expected to be immune in

a population of 2.2 million?
Mathematics
2 answers:
aniked [119]3 years ago
4 0
Just work out 82% of 2.2 million , the answer would be around : 1804000
lions [1.4K]3 years ago
4 0

Answer:

Hi!

The answer is: 1.804.000 cockroaches are immune.

Step-by-step explanation:

To solve this problem, you can use <em>the rule of three</em>.

     100 ----> 2.200.000 cockroaches  // If 100% is 2.200.000 cockroaches

     82 ----> x cockroaches  // then 82% will be immunes.

Now, multiply 82 by 2.200.000 and divide the result by 100:

x =\frac{82*2.200.000}{100} = 1.804.000

<u>1.804.000 cockroaches are immune.</u>

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