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yKpoI14uk [10]
3 years ago
7

According to a study, 91% of all adults have a cell phone. An employee of a cell phone company attends a community event and has

a special offer to give to first time cell phone owners. If she randomly selects adults in attendance at the event and cell phone ownership is independent from adult to adult, what is the probability that she asks 21 adults total to find the first one that does not own a cell phone?
Mathematics
1 answer:
umka2103 [35]3 years ago
6 0

Answer:

(0.91)^{20}(0.09)

Step-by-step explanation:

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The length of the parametric curve (call it <em>C </em>) is given by

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We have

x=t-2\sin t\implies\dfrac{\mathrm dx}{\mathrm dt}=1-2\cos t

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Now,

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2 years ago
What’s the comparison to 3/25 and 22/25
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Answer:

This is the answer. Hope it helps

Step-by-step explanation:

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2 years ago
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2 years ago
This drawing shows an Isosceles triangle. Work out the size of angle a. ​
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3 years ago
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3 years ago
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