The answer is 0.5 metres.
4/2 = 1/2
1/2 100cm is 50cm
50cm = 0.5 metres.
15 devided by 2 equals 7.5
through my calculations x=8
Answer: Option 'c' is correct.
Step-by-step explanation:
Since we have given that
Sample size = 865 = n
Number of voters favor approval of an issue before the legislature = 408 = x
So, 
At 95% confidence level of significance, z = 1.96
So, confidence interval would be

Hence, option 'c' is correct.