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saul85 [17]
3 years ago
7

There are 75 students performing in the holiday concert. Of the students, 30 are boys. What percent of the students are boys?

Mathematics
1 answer:
viva [34]3 years ago
8 0

Answer:

Total students = 75

Boys = 30

<h3>Percentage</h3>

\sf \frac{30}{75}  \times 100\% \\   \sf=  \frac{10}{25}  \times 100\% \\  \sf =  \boxed{ \bold{ \red{40\%}}}

Hope it helps!

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The diagram shows a sector of a circle radius 10cm
Yuki888 [10]

Answer:

\text{Perimeter of sector = 43.6 (Rounded to the nearest tenth.)}

Step-by-step explanation:

\text{Perimeter of the sector = Radius + arc length + radius}

\text{Radius = 10 cm}

\text{Perimeter of the sector = 10 + arc length + 10  }

 \text{Perimeter of the sector = 20 + arc length  }

\text{arc length   = (sector angle/ 360 ) * perimeter of the circle}

\text{Perimeter of a circle }=2\pi r

\text{sector angle} = 135

\text{arc length}   =  (135/ 360 ) * 2\pi (10)

= (3/8) 20\pi

= 15\pi /2

\text{Using  }\pi =3.14

= 15 * 3.14 /2

= 23.55

\text{Perimeter of the sector = 20  + 23.55}

= 43.55

= 43.6  cm

\text{perimeter of the sector  = 43.6  cm }

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