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Sveta_85 [38]
2 years ago
5

The circumference of a circle is 87 cm. What is the DIAMETER of the circle?

Mathematics
2 answers:
harkovskaia [24]2 years ago
4 0

Answer:8 cm

Step-by-step explanation:

Basile [38]2 years ago
4 0
I think the answer is 8cm
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a circular garden has a diameter of 12 feet. what is the best approximation for the circumference of the garden? use 3.14 to app
Nuetrik [128]

Answer:

37.68

Step-by-step explanation:

C(circumference)= 2pi r

If the diameter is 12, the r adius is 6

plug into equation

2(pi)(6)

=12pi

=37.68

3 0
3 years ago
5. Suppose that a particular candidate for public office is in fact favored by p = 48% of all registered voters. A polling organ
mart [117]

Answer:

Probability that the sample proportion will be greater than 0.5 is 0.8133.

Step-by-step explanation:

We are given that the a particular candidate for public office is in fact favored by p = 48% of all registered voters. A polling organization is about to take a simple random sample of voters and will use the sample proportion to estimate p.

Suppose that the polling organization takes a simple random sample of 500 voters.

<em>Let </em>\hat p<em> = sample proportion</em>

The z-score probability distribution for sample proportion is given by;

               Z = \frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion

           p = population proportion = 48%

           n = sample of voters = 500

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

So, probability that the sample proportion will be greater than 0.5 is given by = P( \hat p > 0.50)

  P( \hat p > 0.50) = P( \frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } } < \frac{0.50-0.48}{\sqrt{\frac{0.50(1-0.50)}{500} } } ) = P(Z < 0.89) = 0.8133

<em>Now, in the z table the P(Z </em>\leq<em> x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 0.89 in the z table which has an area of 0.8133.</em>

Therefore, probability that the sample proportion will be greater than 0.50 is 0.8133.

6 0
3 years ago
Find the area of a circle with a radius of 70 centimetres
Alla [95]

Answer:

15393.8cm sorry if im wrong

7 0
2 years ago
Geometry proofs. Prove Angle B = Angle C
koban [17]

Answer: It is vertical

Step-by-step explanation:

8 0
2 years ago
I don’t know how to answer this
Vladimir [108]

Answer:

Triangle with Blue shape inside.  All of the other shapes are divided up in to triangles.  The triangle on bottom (with blue shape inside) is divided up into polygons.

Step-by-step explanation:

4 0
3 years ago
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