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
Answer:
Below in bold.
Step-by-step explanation:
1) ( a^2 + b^2 = (a + b)^2 - 2ab
= 29 - 2(6)
= 29-12
= 17.
2). (x - y)^2 = x^2 + y^2 - 2xy
so 20 = 18 - 2xy
2xy = 18-20 = -2
xy = -1.
3). 1/x + x = 7
(1/ x + x)^2 = 1/x^2 + x^2 +x/x + x/x
= 1/x^2 + x^2 + 2
But(1/x + x)^2 = 7^2 = 49
so 1/x^2 + x^2 + 2 = 49
so 1/x^2 + x^2 = 49 - 2 = 47.
The number of passwords that would be allowed if users were allowed to reuse the letters and numbers is 30891577600
<h3>How to determine the number of passwords</h3>
The given parameters are:
Password length = 8
Letters = 6
Numbers = 2
There are 26 letters and 10 digits.
Since the letters and the numbers can be repeated, then the number of passwords is:
Count = 26^6 * 10^2
Evaluate
Count = 30891577600
Hence, the number of passwords that would be allowed if users were allowed to reuse the letters and numbers is 30891577600
Read more about combination at:
brainly.com/question/11732255
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Answer:
From Larry's rate, the equation can be given as D = T/101010
Step-by-step explanation:
Larry's book has 400400400 pages
His reading rate is 101010 pages per day
Let D = Number of days to read the book
To get the number of days it takes fro Larry to read this book, we say
Total pages = Reading rate (pages/day) x Number of days
Let Total pages = T
and Reading rate = R
Hence;
D = T / R
From Larry's rate, the equation can be given as D = T/101010.
From the question,
ddd = 400400400 (pages) / 101010 (pages/day) = 3963.9 days
Hence, it takes Larry approximately 3964 days to read the book.
Answer:
f(x)=11
g(x)=8
Step-by-step explanation:
f(x)=(2)+9=11
g(x)=4(2)=8
BRAINLIEST PLEASE
