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3 years ago

8

What is the circumference?

2 answers:

Tanya [424]3 years ago

8 0

Answer: the circumference is the perimeter of a circle or ellipse. That is, the circumference would be the arc length of the circle, as if it were opened up and straightened out to a line segment. More generally, the perimeter is the curve length around any closed figure.

STALIN [3.7K]3 years ago

8 0

Circumference formula: 2 x pi x radius
so... 2 x 3.14 x 6 = 37.68
c= 37.68 inches

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3 years ago

Kim walked diagonally across a rectangluar field that measured 100 ft by 240ft how far did she walk?

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3 years ago

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marshall27 [118]

Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

Read 2 more answers

Let X1, X2, and X3 represent the times necessary to perform three successive repair tasks at a service facility. Suppose they ar

belka [17]

Answer:

The mean of the total repair time is 150 minutes.

The variance of the total repair time is 725 minutes^2.

Step-by-step explanation:

To solve this problem, we have to use the properties of the mean and the variance. Our random variable is the sum of 3 normal variables.

In the case, for the mean, we have that the mean of the sum of 3 normal variables is equal to the sum of the mean of the 3 variables:

$y=x_1+x_2+x_3 \\\\E(y)=E(x_1+x_2+x_3)=E(x_1)+E(x_2)+E(x_3)\\\\E(y)=50+60+40=150$

For the variance, we apply the property for the sum of independent variables (the correlation between the variables is 0):

$V(y)=V(x_1)+V(x_2)+V(x_3)\\\\V(y)=s_1^2+s_2^2+s_3^2\\\\V(y)=15^2+20^2+10^2\\\\V(y)=225+400+100\\\\V(y)=725$

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3 years ago