I can’t see your scream is crack
Answer: a) Required minimum sample size= 219
b) Required minimum sample size= 271
Step-by-step explanation:
As per given , we have
Margin of error : E= 5% =0.05
Critical z-value for 90% confidence interval : 
a) Prior estimate of true proportion: p=28%=0.28
Formula to find the sample size :-

Required minimum sample size= 219
b) If no estimate of true proportion is given , then we assume p= 0.5
Formula to find the sample size :-

Required minimum sample size= 271
Jabardasth question is the scale factor is 2
21.6 x 6.2 = 133.92
Cheryl can travel on 133.92 miles
Answer:
4.91 is the answer
Explanation:
4.908 the hundredths place is the 0, and 8 is greater than 5, so it would become 4.91