Answer:
48 km/h
Step-by-step explanation:
80/50*30=48 km/h
Answer:
the answer is 7 i believe
The correct answer would be C
Answer:
4.4in
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Given : sample size : n= 51
sample standard deviation : s= 0.46
Significance level : 
Using chi-square distribution, the critical values will be :


Confidence interval for population standard deviation (
) :

Substitute all the values , we get

Hence, the 95% two-sided confidence interval for σ : 