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3 years ago

A set of two concentric circles is shown above. What is the area of the shaded portion above?

Mathematics

1 answer:

algol133 years ago

4 0

Answer:

The answer is " $44 \ m^2$ "

Step-by-step explanation:

$R=4.5 \ m \\\\r=2.5\ m\\\\$

The area between two concentrated circles via an exterior circle radius R and an internal circle

$r =\pi(R^2-r^2)$

The region, therefore, consists of two concentrated circles with radii of 4.5 m and 2.5 m.

$r=\pi(4.5^2 -2.5^2)\\\\$

$=\frac{22}{7} (20.25-6.25) \\\\ =\frac{22}{7} (14) \\\\=22 \times 2 \\\\ =44 \ m^2$

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3 years ago

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The formula for distance between two points is:

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To solve this you must use the rules of PEMDAS (Parentheses, Exponent, Multiplication, Division, Addition, Subtraction)

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$\sqrt{(0-3)^{2} + (-9-(-8))^{2}}$

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Next solve the exponent. Again, you must do this from left to right

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Now for the addition

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Your approximate answer would be about 3.16

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