What is the circumference of the circle below?

Mathematics

2 answers:

Shalnov [3]3 years ago

7 0

Answer:

113.04 meters.

Step-by-step explanation:

Use the formula

2 times pi times r

r=radius of the circle

or Pi times D

d= diameter of the circle.

The radius is 18 meters.

So, do 2 times 18 times pi.

Brut [27]3 years ago

6 0

Answer:

Step-by-step explanation:

circumference C=2*3.14*r

C=2*3.14*18m=113.04 m

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A library subscribes to two different weekly news magazines, each of which is supposed to arrive in Wednesday's mail. In actuali

Zinaida [17]

Answer:

See pmf of Y below

Step-by-step explanation:

Let's abbreviate the days by using the first letter, W, T, F and S.

The following array shows the possible probabilities for Y.

Since the probabilities are independent Y(a,b) = P(a)*P(b) for any day a,b.

The array shows the pmf of Y, that is, the probability that the number of days beyond TUESDAY (as we are considering W) that it takes for both magazines to arrive after Wednesday equals to or is greater than 0.

$\bf \left[\begin{array}{ccccc}Day&W&T&F&S\\W&0.28^2&0.28*0.38&0.28*0.21&0.28*0.13\\T&0.38*0.28&0.38^2&0.38*0.21&0.38*0.13\\F&0.21*0.28&0.21*0.38&0.21^2&0.21*0.13\\S&0.13*0.28&0.13*0.38&0.13*0.21&0.13^2\end{array}\right]$

computing the probabilities, we get the array

$\bf \left[\begin{array}{ccccc}Day&W&T&F&S\\W&0.0784&0.1064&0.0588&0.0364\\T&0.1064&0.1444&0.0798&0.0494\\F&0.0588&0.0798&0.0441&0.0237\\S&0.0364&0.0494&0.0273&0.0169\end{array}\right]$

The right way to read Y is Y(row,column). For example, the probability that magazine 1 arrives on Thursday and magazine 2 arrives on Friday is Y(T,F) = 0.0798.

3 0

3 years ago

Equation of a line that is parallel to y=3x-4 through the point (5,1) in slope intercept form

mafiozo [28]

Answer:

$y = 3x - 14$