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Annette [7]
3 years ago
9

The lifespan of a laptop battery is normally distributed. If the mean lifespan of a battery is 4 years with a standard deviation

of 1.6 years, what is the probability that the next laptop battery you purchase will last between 3.5 and 5.5 years?
CI = (71.98%, 79.45%)
CI = (72.02%, 78.38%)
CI = (70.23%, 80.17%)
CI = (71.41%, 78.99%)
Mathematics
1 answer:
Gemiola [76]3 years ago
6 0
The answer is :Cl=(70.23%,80.17%)
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lana66690 [7]

Answer:

Yep!

Step-by-step explanation:

I'm not 100% sure if your first one is correct, but I know the second one is! Great job :)

8 0
3 years ago
Can someone please help me with these two please I'll appreciate it :)
s344n2d4d5 [400]
4.

\sqrt{64}=8\\\\8\dfrac17=8.14285714...\\\\8.\overline{14}=8.14141414...\\\\ \dfrac{15}2=7,5\\\\\\ \boxed{\ \dfrac{15}2\ \ \textless \ \ \sqrt{64}\ \ \textless \ \ 8.\overline{14}\ \ \textless \ \ 8\dfrac17\ }

5.

\sqrt{18}  doesn't belong with the other three because it is irrational number
The other three can be expressed as a ratio between two <span>integers.

-\dfrac{10}2=\dfrac{-10\ }2\\\\-13.4=-13\frac4{10}=\frac{-134}{\ 10}\\\\ 22.\overline7=22\frac79=\frac{205}9\\\\\\ \sqrt{18}=\sqrt{9\cdot2}=\sqrt9\cdot\sqrt2=3\sqrt2
</span>

7 0
3 years ago
Need help stat! 100 POINTS
kirill115 [55]

Answer:

the answer is 67 square inches.

8 0
2 years ago
Read 2 more answers
Answ
Amiraneli [1.4K]

Answer:

1. 7

2. 48

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you have to <u>subtract</u> 49-42 because some got taken away then you should end up with 7, 63-15 is 48.

7 0
3 years ago
Find the zero of f(x) = x^5-12x^2+32x
Alexeev081 [22]
The zeroes of <span>f(x) = x^5-12x^2+32x can be found by factoring,

</span><span>f(x) = x^5-12x^2+32x=(x-8)(x-4)

By the zero product theorem, (x-8)=0 or (x-4)=0 which means 
x=8 or x=4.

So the zeroes of f(x) are S={4,8}</span>
8 0
3 years ago
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