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larisa [96]
3 years ago
5

A particular telephone number is used to receive both voice calls and fax messages. Suppose that 25% of the incoming calls invol

ve fax messages, and consider a sample of 25 incoming calls. (Round your answers to three decimal places.) (a) What is the probability that at most 8 of the calls involve a fax message? (b) What is the probability that exactly 8 of the calls involve a fax message? (c) What is the probability that at least 8 of the calls involve a fax message? (d) What is the probability that more than 8 of the calls involve a fax message?

Mathematics
1 answer:
swat323 years ago
5 0

Answer:

a) 0.8505

b) 0.1241

c) 0.2736

d) 0.1495

Step-by-step explanation:

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Multiply 18hours by 60 seconds, the answer is 2880 seconds.

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3 years ago
2 (-4) (-5) =<br> Whats the awnser cause my brain cant HANNDLE THIS
Ganezh [65]

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40

Step-by-step explanation:

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5 0
3 years ago
#1 please! will give great rating! please explain to!
ddd [48]
Find the perimiter now

that is right triangle so
when hpotonouse is c and hthe lgs are a and b
a²+b²=c²

given
leg is 8
hypotonuse is 13

8²+b²=13²
64+b²=169
minus 64 from both sides
b²=105
sqrt both sides
b=√105

find total perimiter
8+13+√105=21+√105

times 1/32 for scale
0.65625+0.32021721143623744947565745876628=
0.97646721143623744947565745876628 m=
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A is the answer
7 0
3 years ago
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White raven [17]

Answer:

3^(2/15)

Step-by-step explanation:

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5 0
3 years ago
Select the angle that correctly completes the law of cosines for this triangle. 72 + 252 – 2(7)(25)cos ___ = 242 A. 180° B. 90°
meriva

Answer:

x =76.45 degrees

Step-by-step explanation:

72 + 252 – 2(7)(25)cos _x__=242

combine like terms

324-350cosx = 242

subtract 324 from each side

-350x = -82

divide by -350

cos x = -82/-350

cos x = 82/350

take the arccos of each side

arccos (cos x) = arccos (82/350)

x =76.45 degrees


7 0
3 years ago
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