MATHEMATICS MIDDLE SCHOOL

A circle with area 100 pie has a sector with a central angle of 2/5pi radius

Answers

Answer 1

Answer:

The area of the sector is 20π.

Step-by-step explanation:

The area of the circle = 100π
The formula for area of the circle = πr²
The central angle of the sector = (2/5)π radians

The central angle should be converted from radians to degrees.

To convert radian to degree :

1 rad × 180/π gives the degree value.

Therefore, (2/5)π × 180/π = (2/5) × 180

The π gets cancelled out.

⇒ 2× 36

⇒ 72°

To find the area of the sector :

The formula to calculate area of the sector = (central angle/360) × πr²

⇒ (72/360) × 100π

⇒ (1/5) × 100π

⇒ 20π

The area of the sector is 20π.

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Answers

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Answers

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Answers

Answer:

Step-by-step explanation:

CeeCee recorded the number of necklaces for sale at 10 different locations and then arranged the numbers from smallest to largest. The numbers of necklaces for sale at the locations were 4, 4, 4, 5, 8, 9, 9, 9, 9, and 9. The mean number of necklaces for sale at the locations was 7.What is the mean absolute deviation?

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