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joja [24]
3 years ago
6

Look and solve plz herhenh

Mathematics
1 answer:
vodomira [7]3 years ago
5 0

Answer:

s = 33

Step-by-step explanation:

99=3s

(99/3) = s

s=33

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R/3 = 7
dangina [55]
R=21. 21/3=7. To check your answer, you can do 7x3 and it'll equal 21.
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Jonathan's preschool class has 9 girls and 6 boys. Which proportion can be used to determine the percent, P, of boys in class?
dimulka [17.4K]

Answer:

B

Step-by-step explanation:

you are comparing percent to percent and total boys to total class.

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Please help me guyys
algol13

Answer:

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2 years ago
Find the sale price of a $50 bookshelf that is on sale for 15% off.
enot [183]

Answer:

You will pay $42.50

Step-by-step explanation:

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2 years ago
You want to create a 99% confidence interval with a margin of error of .5. Assuming the population standard deviation is equal t
miss Akunina [59]

Answer:

Sample size minimum is 60

Step-by-step explanation:

given that you want to create a 99% confidence interval with a margin of error of .5.

The population  standard deviation is equal to 1.5

i.e. \sigma = 0.5

Confidence level = 99%

Since population std deviation is known, we can use Z critical value for finding margin of error

Z critical value for 99% = 2.58

Margin of error = 2.58*\frac{1.5}{\sqrt{n} }

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2.58*\frac{1.5}{\sqrt{n} }=0.5\\\sqrt{n} =7.74\\n =59.90\\n=60

8 0
3 years ago
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