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.
I think its D. 32.6 s/ft and appoximatley 0.03 ft/s
Answer:
Question 2 is y = 1/2 x - 2
Question 3 is y=-2x+4
Question 4 is y = x + 3
Your other questions don't have pictures of the graph so I can't solve them sorry. Have a good day.
Answer:
2000 Pounds
Step-by-step explanation:
There are 2000 pounds in a US ton.
There are 2240 pounds in an Imperial ton.
There are 2204.62 pounds in a metric ton.
Answer:
36
Step-by-step explanation:
473/13
= 36 .38
round to the lower whole number