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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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5 0
3 years ago
Find the value of x in the triangle (not drawn to scale.)
AlekseyPX

Your answer would be 29

Why?

Because that is a right angle. They always have to be 90° so 90-61=29

6 0
3 years ago
If –y + 2x^2 – x = -5y^3 then find dy / dx in terms of x and y.
vlada-n [284]

Answer:

dy/dx = \frac{4x-1}{1-15y^{2} }

Step-by-step explanation:

-y + 2x²- x = -5y³

2x² - x = y - 5y³

4x - 1 = dy/dx - 15y².dy/dx

dy/dx(1 - 15y²) = 4x - 1

dy/dx = \frac{4x-1}{1-15y^{2} }

8 0
2 years ago
the volume of hemisphere is 1527.4cm^3.find the radius of the hemisphere to the nearest whole whole number.(take π to be 22/7)​
skelet666 [1.2K]

Answer:

radius of the hemisphere = 9 cm approx

Step-by-step explanation:

Volume of hemisphere = \frac{2}{3} \pi r^{3}

1527.4 = \frac{2}{3} * \frac{22}{7} * r^{3}

\frac{7*15274*3}{2*22*10} = r^{3}

\frac{320754}{440} = r^{3}

r^{3} = 729

r = \sqrt[3]{729}

r = 9 cm approx.

6 0
3 years ago
If the graphs of the linear equations in a system are parallel,what does that mean about the possible solution (s) of the system
Black_prince [1.1K]

Answer:

it means that there will be no solution .

<h2><em>hope this helped <3</em></h2><h2><em /></h2>

<em>-bubb0</em>

5 0
3 years ago
Read 2 more answers
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