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3 years ago

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Mathematics

1 answer:

r-ruslan [8.4K]3 years ago

6 0

Answer:

3 i 5uintgcgggfgvvvb

Step-by-step explanation:

yggy

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The daily revenues of a cafe near the university are approximately normally distributed. The owner recently collected a random s

lbvjy [14]

Answer:

The sample size to obtain the desired margin of error is 160.

Step-by-step explanation:

The Margin of Error is given as

$MOE=z_{crit}\times\dfrac{\sigma}{\sqrt{n}}$

Rearranging this equation in terms of n gives

$n=\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2$

Now the Margin of Error is reduced by 2 so the new M_2 is given as M/2 so the value of n_2 is calculated as

$n_2=\left[z_{crit}\times \dfrac{\sigma}{M_2}\right]^2\\n_2=\left[z_{crit}\times \dfrac{\sigma}{M/2}\right]^2\\n_2=\left[z_{crit}\times \dfrac{2\sigma}{M}\right]^2\\n_2=2^2\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2\\n_2=4\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2\\n_2=4n$

As n is given as 40 so the new sample size is given as

$n_2=4n\\n_2=4*40\\n_2=160$

So the sample size to obtain the desired margin of error is 160.

4 0

3 years ago

Workers Inc. just bought 14 boxes of pens to put in their storage room for employees to use as needed. Each box contains 45 pens

Igoryamba

14x45=630
43×2=86
(14×45)-(43×2)= 630-86=544
there would be 544 pens left

3 0

3 years ago

H and J are both between G and K such that GH = JK and H is between G and J.

DIA [1.3K]

Answer:

Step-by-step explanation:

So the order of the points is: GHJK

GH = x+10 =JK

HJ=8

JK=2x-4

JK = x+10=2x-4

x+10=2x-4

10+4=2x-x

x=14

GH= 14+10 =24

GJ = GH +HJ = 24+ 8=32

6 0

3 years ago

Plzz answer if u know it

liraira [26]

Answer:

A . 60

Step-by-step explanation:

30 x 2 = 60

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2 years ago

Helppppppppppppppppppppppppp ASAP

S_A_V [24]

Answer:

4.8

Step-by-step explanation:

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3 years ago