Wallet = belt + 31
jacket = 3 · belt
176 = belt + wallet + jacket
176 = belt + (belt + 31) + (3 · belt)
176 = (2 · belt) + 31 + (3 · belt)
176 = (5 · belt) + 31
5 ·belt = 145
belt = 29
Answer: answer is in picture
Step-by-step explanation:
Answer: a) 
b) 
Step-by-step explanation:
Given : Sample size of respondents in the exit polls : n= 2020
Number of respondents voted for George Bush = 412
Sample proportion: 
a) Critical value for 99% confidence level : 
Confidence interval for proportion:-


Hence, the 99% confidence interval for the proportion of college graduates in Ohio that voted for George Bush: 
b) Critical value for 95% confidence level : 
Lower confidence bound for the proportion :

Hence, a 95% lower confidence bound for the proportion of college graduates in Ohio that voted for George Bush : 
Answer:
25% is the answer.,....
money Alicia save= 28-21= 7
percentage Alicia saves with the sale= 7/28*100
= 25%