Answer:
9π or 28.27 cm
Step-by-step explanation:
The circumference formula is 2πr or dπ. The diameter is 9 cm so we multiply 9 with pi to get the answer.
Answer:
B
Step-by-step explanation:
V = 4/3 * radius^3 * pi = 4/3 * 4^3 * pi = 256 /3 * pi
Answer:
0.18
Step-by-step explanation:
Answer: 0.064
Step-by-step explanation:
The formula to find the margin of error :-

Given : Significance level : 
Critical value : 
Sample size : n=400
The proportion of people support the candidate :p=0.44
Then , 
Hence, Margin of error = 0.064