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Vilka [71]
3 years ago
10

75% of Grant’s coin collection is quarters. If Grant has 200 coins in his collection, how many are quarters?

Mathematics
1 answer:
Eddi Din [679]3 years ago
5 0

Answer:

150 of Grant`s coins are quarters. i hope this helped

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An article regarding interracial dating and marriage recently appeared in the Washington Post. Of the 1,709 randomly selected ad
VMariaS [17]

Answer:

The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

323 blacks, 86% of blacks said that they would welcome a white person into their families. This means that n = 323, p = 0.86

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.86 - 1.96\sqrt{\frac{0.86*0.14}{323}} = 0.8222

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.86 + 1.96\sqrt{\frac{0.86*0.14}{323}} = 0.8978

The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

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3 years ago
Please help! Brainiest answer worth 15 points
USPshnik [31]

Answer: I think it is SAS

Step-by-step explanation:

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4 years ago
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The answer is going to be (D)
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Determine the equation of the graph.
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Answer: C

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Destiny just received two separate gifts from her great-great-grandmother. The first gift is a box of 181818 chocolate candy bar
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Greatest common factor of 18 and 12 is 6

18/6 = 3
12/6 = 2

so she can make 6 bags...each containing 3 chocolate bars and 2 bags of cookies


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4 years ago
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