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shtirl [24]
3 years ago
15

The distance from the center of a center of a compact disc to the edge of the disc is 6 centimeters. What is the area of the com

pact disc?
A. 452.16 square centimeters
B. 36 square centimeters
C. 113.04 square centimeters
D. 18.84 square centimeters
Mathematics
1 answer:
melamori03 [73]3 years ago
3 0
This is the area of a circle with radius 6 cms
=  pi * r^2
= 36pi
=  113.04 cm^2

C
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Tower one, a cube with a hexagonal prism measures 15.6cm. Tower two, a cube with a cylinder measures 18.3cm. Tower 3, a hexagona
lina2011 [118]

Answer:

Tower 4 = 23.9cm

Step-by-step explanation:

Given

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Tower 3 = 13.9 cm.

Required:

Height of the 4th tower

Represent a cube by X; a cylinder by Y and a hexagonal prism by Z

Tower one, a cube with a hexagonal prism = X + Z = 15.6

Tower two, a cube with a cylinder = X + Y = 18.3

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X - X + Y - Z = 18.3 -15.6

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Y  = \frac{16.6}{2}

Y  = 8.3cm

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X + Y = 18.3 ----- Equation 2

X + 8.3 = 18.3

Subtract 8.3 from both sides

X + 8.3 - 8.3 = 18.3 - 8.3

X = 18.3 - 8.3

X = 10cm

Z + Y = 13.9 ----- Equation 3

Z + 8.3 = 13.9

Subtract 8.3 from both sides

Z + 8.3 - 8.3 = 13.9 - 8.3

Z = 13.9 - 8.3

Z = 5.6cm

So, we have that

X = 10cm

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Z = 5.6cm

The question states that the 4th tower is made up of the three shapes;

This implies that;

Tower 4 = X + Y + Z

Tower 4 = 10cm + 8.3cm + 5.6cm

Tower 4 = 23.9cm

The height of the 4th tower is 23.9cm

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