Answer:
1 significant figure
Step-by-step explanation:
Zero is significant when:
It occurs between two non-zero integers, such as 408; it occurs at the end of a number that contains a decimal point, such as 570. or 1.300
Zero is not significant when:
It is before the first non-zero integer, such as 0.0057 (two significant figures); it is at the end of a number that does not contains a decimal point, such as 253,000 (three significant figures)
(trust me I'm taking chemistry this year and literally that is the 'rule' that is written down in my notebook)
