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mrs_skeptik [129]
3 years ago
9

Heelppppppppp!!!!! Please?!

Mathematics
2 answers:
finlep [7]3 years ago
6 0

To calculate the area shaded green, we first calculate the sum of areas S=A1+A2+A3.   The green area is the area of circle A less the sum of white areas S.

Also, note that the

area of an equilateral triangle with side s

=(sqrt(3)*s)*s/2

=sqrt(3)*s^2/2.

Proceeding,

A1

=sqrt(3)s^2/2

=sqrt(3)7^2/2

=49sqrt(3)/2

A2

=60/360 of the area of the circle

=60/360*(pi r^2)

=1/6*(pi*7^2)

=49pi/6

A3=A1

=49sqrt(3)/2

S=A1+A2+A3

=49sqrt(3)/2+49pi/6+49sqrt(3)/2

=49sqrt(3)+49pi/6

=49(sqrt(3)+pi/6)

Area shaded green

= pi r^2 - S

=pi 7^2 - S

=49pi - 49(sqrt(3)+pi/6)

=49(5pi/6-sqrt(3))


Gre4nikov [31]3 years ago
3 0

To calculate h evaluate inside the square root before taking the square root

h = √(7² - 3.5²) = √(49 - 12.25) = √36.75 = 6.06 ( to 2 dec. places)


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Katen [24]
.44 is the correct answer
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snow_tiger [21]
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Find the median and mean of the data set below: 30, 39, 24, 19, 18 Median Mean​
Eva8 [605]

Answer:  mean=26 , median=24

Step-by-step explanation:

Mean=Sum of all values/number of values

mean= 30+39+24+ 19+18/5

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Median

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4 0
2 years ago
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A cone has a volume of 1570 cubic inches. Which of the following gives the volume of a cylinder with the same radius and same he
Hitman42 [59]

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3 years ago
Calculate the length of AC to one decimal place in the trapezium below.
a_sh-v [17]

Answer:

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We will use Pythagorean theorem to find the second cathetus b

b=√16∧2-7∧2= √256-49= √207 ≈ 14.39cm =DC =>

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AC=18.1cm

Good luck!!

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