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
Answer:
I think it's 3.5, but this information is super vague, so try to uhh scroll down to see if there's more information
Step-by-step explanation:
B. As all the sides are different lengths and angle f is bigger than 90 so it is obtuse
Hope this helps
Answer:
41
Step-by-step explanation: 180 is the full amount of angles in a triangle
101+38 is 139
180-139 is 41
The answer to the equation is 15