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ipn [44]
2 years ago
9

Walter bought 500 marbles at the swap meet. Two-fifths of them

Mathematics
1 answer:
MrRissso [65]2 years ago
4 0

Step-by-step explanation:

2/5 of marbles are blue

= 3/5 of marble are not blue.

Number of non-blue marbles = 500 * (3/5) = 300.

300 marbles are not blue.

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On a map, 90 miles is represented by 3 inches.
jarptica [38.1K]
If the ratio is 90:3 and there are 4 groups of 3 in 12, then the ratio would then be 450:12, leaving you with 450 as the answer. Hope I helped
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3 years ago
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Assume that a sample is used to estimate a population proportion p. find the margin of error e that corresponds to the given sta
Leno4ka [110]

Let p be the proportion. Let c be the given confidence level , n be the sample size.

Given: p=0.3, n=1180, c=0.99

The formula to find the Margin of error is

ME = z _{\alpha/2}  \sqrt{\frac{p*(1-p)}{n}}

Where z (α/2) is critical value of z.

P(Z < z) = α/2

where α/2 = (1- 0.99) /2 = 0.005

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So in z score table look for probability exactly or close to 0.005 . There is no exact 0.005 probability value in z score table. However there two close values 0.0051 and 0.0049 . It means our required 0.005 value lies between these two probability values.

The z score corresponding to 0.0051 is -2.57 and 0.0049 is -2.58. So the required z score will be average of -2.57 and -2.58

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For computing margin of error consider positive z score value which is 2.575

The margin of error will be

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7 0
2 years ago
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erica [24]

Answer:

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Step-by-step explanation:

required percentage is :

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<em>i</em><em> </em><em>hope</em><em> </em><em>it</em><em> </em><em>helped</em><em>.</em><em>.</em><em>.</em>

3 0
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Step-by-step explanation:

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8 0
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Write standard form twenty-five thousand, four hundred eight
hoa [83]
In standard form it is 25,408
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3 years ago
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