Answer:
900 sample size
Step-by-step explanation:
To determine the sample size for a proportion, the margin of error formula is used to determine this:


Where p is the proportion, E is the margin of error, n is the sample size, q = 1 - p,
is the z score.
Since the proportion is not known, the sample size needed to guarantee the confidence interval and error is at p = 0.5 and q = 1 - p = 1 - 0.5 = 0.5
E = 5% = 0.05,
= 3. Hence:

Answer:

Step-by-step explanation:
To find : Convert
into 
Solution :
We convert units one by one,



Converting temperature unit,


So, 
Substitute all the values in the unit conversion,



Therefore, The conversion of unit is 
Answer:6.774 gallons
Explanation: They drove 210 miles with 31 miles per gallon. So you divide 220/31=x
X=6.774 gallons
15/100=0.15
60*0.15=9
60-9=$52 after discount
Answer: 
Step-by-step explanation:




