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irga5000 [103]
3 years ago
13

Plz, help!!!! :[ I don't know the answer look at the pic

Mathematics
1 answer:
otez555 [7]3 years ago
6 0

Answer:

174 in²

Step-by-step explanation:

(A1)= 9(5)= 45 in²

(A2)= 3(5)=15 in²

(A3)= 3(5)=15 in²

(A4)= 9(3)= 27 in²

(A5)= 9(5)= 45 in²

(A6)= 9(3)= 27 in²

(totalA)= 45+15+15+27+45+27= 174 in²

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Answer: 0.0170

Step-by-step explanation:

Given : The mean amount purchased by a typical customer at Churchill’s Grocery Store is $23.50, with a standard deviation of $5.00.

i.e. \mu=23.50

\sigma=5

We assume the distribution of amounts purchased follows the normal distribution.

Sample size : n=50

Let \overline{x} be the sample mean.

Formula : z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

Then, the probability that the sample mean is at least $25.00 will be :-

P(\overline{x}\geq\25.00)=P(\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\geq\dfrac{25-23.50}{\dfrac{5}{\sqrt{50}}})\\\\=P(z\geq2.12)\\\\=1-P(z

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5 0
3 years ago
in a fundraising committee of 90 people the ratio of men to women is 7:2. find the number of women required to join the existing
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Hello,

Step-by-step explanation:

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I hope that helps. :)
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