3 years ago

The difference of n and a number 25 write the expression

Mathematics

1 answer:

iogann1982 [59]3 years ago

5 0

Answer:a + n = 25

Step-by-step explanation:

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the diameters of Douglas firs grown at a Christmas tree farm are normally distributed with a mean of 4 inches and a standard dev

aksik [14]

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Proportion of the trees will have diameters between 2 and 6 inches = 0.8164

Step-by-step explanation:

Given -

Mean $(\nu )$ = 4

Standard deviation $(\sigma )$ = 1.5

Let X be the diameter of tree

proportion of the trees will have diameters between 2 and 6 inches =

$P(2< X< 6)$ = $P(\frac{2 - 4 }{1.5}< \frac{X - \nu }{\sigma}< \frac{6 - 4 }{1.5})$

= $P(\frac{-2 }{1.5}< Z< \frac{2 }{1.5})$ Put [ $Z = \frac{X - \nu }{\sigma}$ ]

= $P(-1.33< Z< 1.33)$

= $(Z< 1.33) - (Z< -1.33)$

= .9082 - .0918

= 0.8164

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3 years ago

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Answer:

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Step-by-step explanation:

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That the equation 25+7(C)

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3 years ago

Free :)<br> have a good day losers <br> <3

Marina86 [1]

Step-by-step explanation:

thanks but not to losers,.... victory is waiting there for me...