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kakasveta [241]
2 years ago
7

The circumference of this CD is about 37.7 cm. The diameter of the hole in thecentre is 1.5 cm. What is the distance from the ou

tside edge of the CD to the inside edge?
Mathematics
1 answer:
Sveta_85 [38]2 years ago
6 0

The distance from the outside edge of the CD to the inside edge is; 6.0 - 0.75 = 5.25cm.

<h3>Circumference, diameter and radius</h3>

Since the circumference of the CD is about 37.7cm

We can determine the radius of the CD as follows;

Circumference, C = 37.7 = 2 π × r.

  • r = 37.7/2 × 3.142

  • r = 6.0cm.

However, the diameter of the hole in the center is; 1.5cm, therefore, the radius of the hole in the center is; 1.5/2 = 0.75cm.

Ultimately, the distance from the outside edge of the CD to the inside edge is; 6.0 - 0.75 = 5.25cm.

Read more on circumference:

brainly.com/question/20489969

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Given the rectangle below, write a simplified expression that represents the perimeter and terms of x. Use your expression to so
Tatiana [17]

The expression representing the perimeter is 6x + 39

x = 3. 8

<h3>What is the perimeter?</h3>

The formula for perimeter of a rectangle is given as;

Perimeter = 2 ( length + width)

From the image shown, we have that:

  • length = 2x
  • width = x + 13

Now, let's substitute the value

Perimeter = 2 ( 2x + x + 13)

collect like terms

Perimeter = 2 ( 3x + 13)

Expand the bracket

Perimeter = 6x + 39

If perimeter = 62

62 = 6x + 39

6x = 62 - 39

6x = 23

x = 23/ 6

x = 3. 8

Thus, the expression representing the perimeter is 6x + 39

Learn more about perimeter here:

brainly.com/question/24571594

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7 0
2 years ago
Sasha purchased paint that will cover 400 square feet per gallon. Sasha needs to paint a 4704-square-foot surface with 2 coats o
Greeley [361]

Answer:

12 gallons of paint

Step-by-step explanation:

Sasha can paint 400 square feet using 1 gallon of paint

If she needs to paint 4,704 square feet, then she will need to purchase 4,704 / 400 = 11.76 gallons of paint. Since she can only purchase paint in whole gallons, she will need to purchase 12 gallons of paint (we have to round up).

7 0
3 years ago
The circumference of a circle is 8.34cm. Find the length of the diameter. Give your answer rounded to 2 DP.
RoseWind [281]

Answer:

Diameter, D = 2.65 cm

Step-by-step explanation:

<u>Given the following data;</u>

Circumference of circle = 8.34 cm

To find the length of its diameter;

Mathematically, circumference of a circle is equal to;

C = πD

Where;

  • C is the circumference of a circle.
  • D is the diameter of a circle.
  • Pie, π = 3.142

Substituting into the formula, we have;

8.34 = 3.142 * D

D = \frac {8.34}{3.142}

<em>Diameter, D = 2.65 cm</em>

6 0
3 years ago
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