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likoan [24]
3 years ago
7

SOMEONE PLEASE HELP DUE IN 3 MINS is this right? ​

Mathematics
2 answers:
AlladinOne [14]3 years ago
5 0

Answer:

YES you are right

Step-by-step explanation:11 squared equals 121

Gre4nikov [31]3 years ago
3 0
It’s 1 and 2. 11x11= 121. And -11x-11=121
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in one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean
VARVARA [1.3K]

Answer:

a=1050 -0.126*218=1022.53

So the value of height that separates the bottom 45% of data from the top 55% is 1022.53.  

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the energy consumption of a population, and for this case we know the distribution for X is given by:

X \sim N(1050,218)  

Where \mu=1050 and \sigma=218

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.55   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.45 of the area on the left and 0.55 of the area on the right it's z=-0.126. On this case P(Z<-0.126)=0.45 and P(z>-0.126)=0.55

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-0.126

And if we solve for a we got

a=1050 -0.126*218=1022.53

So the value of height that separates the bottom 45% of data from the top 55% is 1022.53.  

8 0
2 years ago
Guys i got an easy question for u...How is 3.098 written in words?(Easy)
IRISSAK [1]
3 and 98 thousandths 
4 0
3 years ago
Read 2 more answers
Show your full solution
alex41 [277]

Answer:

1.the square pan is larger by 12 inches

40 cm^2

Step-by-step explanation:

The difference in size can be determined by calculating the difference between the perimeter of the square pan and the circumference of a circle

perimeter of a square = 4 x length

14 x 4 = 56 inches

Circumference of a circle = πD = (22/7) x 14 = 44 inches

Difference in size = 56 - 44 = 12 inches

Area of a rectangle = length x width

10 x 4 - 40 cm^2

3 0
3 years ago
Me please I don’t understand
irakobra [83]
9 + 4 = 13

She is 13 floors away
8 0
2 years ago
Read 2 more answers
HELP ILL AWARD BRAINLIEST
Leokris [45]

Answer:

7. 10 8. 20 9. 100 thats all i know

Step-by-step explanation:

6 0
2 years ago
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