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kirill [66]
2 years ago
13

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.9 years, and standard deviation of

0.9 years.
If you randomly purchase one item, what is the probability it will last longer than 9 years?
Mathematics
1 answer:
Darya [45]2 years ago
6 0

If you randomly purchase one item, the probability it will last longer than 9 years is; 11.12%

<h3>How to find the probability from z-score?</h3>

The formula for Z-score is;

z = (x' - µ)/σ

where;

x' = sample mean

µ = population mean

σ = standard deviation

Thus;

z = (9 - 7.9)/0.9

z = 1.22

From online p-value from z-score calculator, we have;

probability = 0.1112 = 11.12%

Read more about Z-score probability at; brainly.com/question/25638875

#SPJ1

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What is the image of A under the translation described by the translation rule (x, y)---&gt;(x + 4, y - 10)?
Mademuasel [1]

Translation rule (x, y)--->(x + 4, y - 10)

Object A = (5, 6)

Apply rule:

(5, 6)---->(5 + 4, 6 - 10) = (9, -4)

Image A' = (9, -4)

Option 3: (9, -4) is the answer

6 0
3 years ago
Where will these 2 lines intersect?<br><br> y = 2x + 7 and x = y + 4
defon
To find the intersecting point, you have to put the two formulas equal to each other
First isolate the same variable, in this case y
So y=x-4

Now we can say
2x + 7 = x - 4

Now solve for x

X= 3

Now fill this in in either one of the formulas

Y= 2 (3) + 7
Y= 13

So they’ll intersect at (3,13)
5 0
3 years ago
Read 2 more answers
Need help quick. Find the measure of x in each figure
IgorLugansk [536]

Step-by-step explanation:

x = 20

plz mark my answer as brainlist plzzzz.

<em>hope </em><em>this</em><em> will</em><em> be</em><em> helpful</em><em> to</em><em> you</em><em> </em><em>.</em>

7 0
3 years ago
What is the value of x in the equation 1.8-3.7x=4.2x+0.3<br><br>​
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15/79

Step-by-step explanation:

or in Alternate form is X= 0.1898734177215

5 0
3 years ago
For which of these sets of data would all the points be displayed on a scatterplot if the window size on a regression calculator
Ivan

Answer:

Step-by-step explanation:

Oh, this is a lot easier than you made it sound, lol.

This is the correct answer:

The table with the following:

X=6,7,9,11,13,14

Y=27,33,39,49,58,71

Lol, I didn't realize that was all this was.

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5 0
3 years ago
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