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yKpoI14uk [10]
4 years ago
5

17,280 meal worms

Mathematics
1 answer:
zubka84 [21]4 years ago
6 0

Answer:

a) 30 000 000

b) -100 000 000

c) -160 000 000

d) 27 500 000

Step-by-step explanation:

You want to know how many bacteria are killed every 6 hours which is 1/10 so 50 000 000:10= 5 000 000 every 6 hours.

a) how many times does 6 hours fit in 1 day) 24÷6=4 so 4×5 000 000= 20 000 000 so then you subtract that from 50 000 000 because you want to know what remains which means 30 000 000 bacteria remain.

b) we already calculated 1 day so 30 000 000×5=150 000 000. Then you subtract that from the 50 000 000. 50 000 000- 150 000 000= -100 000 000

c) 1 day× 7= 30 000 000×7= 210 000 000- 50 000 000= -160 000 000

d) 5 000 000÷2= 2 500 000= 30 000 000- 2 500 000= 27 500 000 6 hours divided by 2 equals 3 hours so you also divide the bacteria by 2.

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