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Ghella [55]
3 years ago
15

How does tripling the circumference of the circle affect the diameter of the circle?

Mathematics
1 answer:
solmaris [256]3 years ago
8 0
The Diameter is also tripled.

Given the area of a circle calculate the radius and circumference
<span>r = √(A / π)<span>C = 2πr
</span></span>
Proof: C= 3in r = 0.477464 d=2r=0.9549296
           C= 9in r= 1.432394 d= 2.864788 = 3x
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Please help me with all these.
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3 years ago
Select the most accurate statement regarding the normal distribution. Group of answer choices It is always the appropriate distr
PSYCHO15rus [73]

Answer:

There is a 95% chance that values will be within ±2 standard deviations of the mean.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value 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. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this question:

According to the empirical rule, 95% of the measures are within 2 standard deviations of the mean. So the correct statement is:

There is a 95% chance that values will be within ±2 standard deviations of the mean.

4 0
3 years ago
Jason spent half of his allowance going to the movies. He washed the family car and earned seven dollars. What is his weekly all
Delvig [45]
13-7=6
6 times 2 =12
his weekly allowance is 12
6 0
2 years ago
Read 2 more answers
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