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2 years ago

What is the circumference of a circle whose radius is 20 feet? Leave answer in terms of π.

Mathematics

2 answers:

lesantik [10]2 years ago

5 0

Answer:

What is the circumference of a circle whose radius is 20 feet? Leave answer in terms of π.

A) 10π feet

B) 20π feet

<u> C) 40π feet </u>

D) 100π feet

Step-by-step explanation:

circumference = 2πr

circumference=2×π×20

circumference=40π

lbvjy [14]2 years ago

3 0

[] Answer []

$\boxed{40\pi \ Feet}$

[] Explanation []

Area = π $r^{2}$

Pi = 3.14

Radius = 20

Our Equation:

3.14 * 20 * 2

3.14 * 20 = 62.8 * 2 = 125.6

$\boxed{[] \ Eclipsed \ []}$

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satela [25.4K]

Answer:

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2 years ago

Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below

BARSIC [14]

Answer:

Due to the higher Z-score, Demetria should be offered the job.

Step-by-step explanation:

Z-score:

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.

In this question:

Whichever applicant had grade with the highest z-score should be offered the job.

Demetria got a score of 85.1; this version has a mean of 61.1 and a standard deviation of 12.

For Demetria, we have $X = 85.1, \mu = 61.1, \sigma = 12$ . So