Answer:
atleast 385
Step-by-step explanation:
Given that an electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricity, they would like know the mean daily power usage for homes there.
Population std deviation = 
Sample size =
STd error of sample mean = 
Margin of error for 95% would be Critical value ( std error)
Here since population std dev is known we can use Z critical value= 1.96

Sample size should be atleast 385
The graph is a function because when you use the vertical line test it does not hit more than one point at any given place on the line.
Hope this helped :)
Answer:
B
Step-by-step explanation:
Answer:
1 hour
Step-by-step explanation:
no explanation its common sense lol
Answer:
19.4285714286 Step-by-step explanation: 272 divided by 14 can be calculated as follows. 272/14 math problems division