Answer:
d. 20
Step-by-step explanation:
Standard deviation is 4.5
Margin error for the problem is 2 hours
Probability 95%, that means that the siginficance level α is 1 – p
α = 1 – 0.95 = 0.05
margin of error (ME) can be defined as follows
ME = Z(α/2) * standard deviation/ √n
Where n is the sample size
Z(0.05/2) = Z(0.025)
Using a z table Z = 1.96
Now, replacing in the equation and find n
2 = 1.96 * 4.5/ √n
2 = 8.82/√n
√n = 8.82/2
√n = 4.41
n = 4.41^2
n = 19.44 ≈ 20
25.3 is what i got for the first image.
a. 122/5
b.
and then 3.14
c. 3.14 has a definite end while pi does not
Answer:
The rectangle with ratio 2:6
As When we simplify 2:6 we get 1:3
The equvalents of 1:3are
2:6 ,3:9,4:12,5:15,6:18,7:21,8:24,9:27,10:30..
Answer:
where is the question at
Step-by-step explanation: