Answer:
Step-by-step explanation:
Given that n =30, x bar = 375 and sigma = 81
Normal distribution is assumed and population std dev is known
Hence z critical values can be used.
For 95% Z critical=1.96
Margin of error = 
Confidence interval = 375±29
=(346,404)
B) 99% confidence
Margin of error = 2.59*Std error =38
Confidence interval = 375±38
=(337, 413)
C) For 90%
Margin of error = 20
Std error = 20/1.645 = 12.158
Sample size

Atleast 44 people should be sample size.
Well, X= 180 - 2w
and angle made by raidus to tangent is 90' , so angle w = 106-90 = 16
and X= 180- 32 = 148
w= 16 , x= 148
hope it helped
Answer:
Step-by-step explanation: The amount of water is the dependent value
Answer:
62/x
Step-by-step explanation:
Answer: Im not too good at math but I will try to help and I will say 70 is the answer...?
Im really sorry if I get this wrong