4 years ago

What is the length of an arc given that the measure of the central angle is 30 degree and the radius is 7 cm?

Mathematics

1 answer:

pogonyaev4 years ago

4 0

La longitud del arco (s) en una circunferencia, conociendo el radio (r) y el ángulo (θ) que forman los dos radios, es:

s = r∙θ

Con el ángulo en radianes

F V7 w7 :

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The length of a rectangle is twice its width. The perimeter of the rectangle is 126ft.

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Alright, so let's make the length x and the width y. 2y=x, and xy=area. 2x+2y=perimeter. Plugging 2y=x into the perimeter equation, we get that 3x=perimeter=126, and x=126/3=42

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3 years ago

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harkovskaia [24]

Answer:

78.88%

Step-by-step explanation:

We have been given that

$\mu=25,\sigma=4,x_1=20,x_2=30$

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For $x_1=20$

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For $x_2=30$

$z_2=\frac{30-25}{4}\\\\z_2=1.25$

Now, we find the corresponding probability from the standard z score table.

For the z score -1.25, we have the probability 0.1056

For the z score 1.25, we have the probability 0.8944

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0.8944 - 0.1056

= 0.7888

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4 years ago

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