Answer:
d. 20
Step-by-step explanation:
The given question implies 5 permutation 2, i.e 
.
But,

= 
So that for 
, n = 5 and r = 2.

= 
= 
= 
Cancel out 3 and 2 with respect to the numerator and denominator.

= 5 * 4
= 20
Therefore,

= 20
So that the correct option is D.
Answer:
B
Step-by-step explanation:
A'C'
Answer: (0.760, 0.820)
Step-by-step explanation:
Let p be the population proportion of all adults feel that "education and our schools" is one of the top issues facing California.
Given : 79% (actual results are 400 out of 506 surveyed) of California adults feel that "education and our schools" is one of the top issues facing California.
i.e.Sample size : n= 506
Sample proportion : 
Critical value for 90% confidence interval ( Using z-value table) :

Now, the 90% confidence interval for the population proportion will be :

i.e. 
i.e. 

Hence, the 90% confidence interval for the population proportion= (0.760, 0.820)
Answer:
20 miles = 32 kilometers
64 kilometers = 40 miles
Step-by-step explanation: