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3 years ago

6

The length of time a particular smartphone's battery lasts follows an exponential distribution with a mean of ten months. A samp

le of 64 of these smartphones is taken. Find the probability that the sample mean is between seven and 11.

1 answer:

aev [14]3 years ago

8 0

Answer:

Probability between 7 and 11 is 0.7799

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2 years ago

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3 years ago

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One large bubble separates into four small bubbles so that the total area of the small bubbles is equal to the area of the large

sergey [27]

Answer:

R = 10 cm

Step-by-step explanation:

The area of a spherical shape is given by :

$A=4\pi r^2$

Where

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ATQ,

One large bubble separates into four small bubbles so that the total area of the small bubbles is equal to the area of the large bubble.

The radius of each small bubble is 5 cm

Using the given condition,

$4\pi R^2=4\times (4\pi r^2)\\\\R^2=4r^2\\\\R=\sqrt{4r^2} \\\\R=2r\\\\R=2\times 5\\\\R=10\ cm$

So, the radius of the large bubble is equal to 10 cm.

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3 years ago

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