It has 3 zeroes which are

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0.5 / 100 * X = 3
X = 3 * 100 / 0.5 = 300 / 0.5 = 600
Answer: 37
Step-by-step explanation:
a=12
35 < b < 40

- 9 and - 3
consider 3 units to the left and right of - 6
- 6 - 3 = - 9 ( 3 units to the left of - 6 )
- 6 + 3 = - 3 ( 3 units to the right of - 6 )