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lianna [129]
3 years ago
5

the distance from the center of a compact disc to the edge of the disc is 6 centimeters what is the area of the compact desk

Mathematics
2 answers:
Gelneren [198K]3 years ago
8 0
The formula for the area of a circle is A=\pi r x^{2}

The radius if half your diameter,
 
In this case your diameter is 12 so your radius is 6

Then you plug it in the equation, so it is A= \pi  6^{2} or A=36 \pi

This leaves you with the area at about 113.04 centimeters ^{2}
Mumz [18]3 years ago
5 0
Area is calculated using the value of pi times the square of the
radius. Therefore, the area of a standard compact disc is 113.0976
square centimeters.
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Write TRUE if the underlined word in the statement is correct.If not , change the underlined word to make it correct.
kobusy [5.1K]

Change the underlined words if it is not correct and write true if it is correct.

<h3>Integers</h3>

<u>1.</u><u> </u><u>P</u><u>ositive</u> integers are not whole numbers.

Negative integers are not whole numbers.

2. All whole numbers are <u>integers</u>.

True

3. <u>Zero</u> is the smallest whole number.

True

4. Any whole number greater than <u>zero</u> is a positive integers.

True

5. Fractions and Decimals are not integer.

6. 1 is a counting number and a positive integers.

True

7. Rational number include all integers , fraction, or terminating decimals.

True

8. Any whole number that is <u>greater</u> than 0 is a negative integers.

  • Any whole number that is <u>less</u> than 0 is a negative integers.

Learn more about integers:

brainly.com/question/10853762

7 0
2 years ago
How can I solve this?<br>Please use the simplest format​
IgorLugansk [536]

Answer:

option D is true.

Step-by-step explanation:

The right-angled triangle is shown.

From the right-angled triangle,

The angle Ф = 60°

We know that the trigonometric ratio

tan Ф = opposite / adjacent

  • opposite = 4
  • adjacent = n

Thus,

tan 60 = 4 / n

√3 = 4/n

n = 4/√3

Thus,

n = 4/√3

  = (4 × √3) / (√3 × √3)

  = 4√3 / 3

Thus,

n  = 4√3 / 3

Using Pythagorean theorem

m = √n²+4²

m=\sqrt{\left(4\cdot \frac{\sqrt{3}}{3}\right)^2+4^2}

m=\sqrt{\frac{4^2}{3}+4^2}

m=\sqrt{\frac{64}{3}}

m=\frac{8}{\sqrt{3}}

m=\frac{8\sqrt{3}}{3}

Thus,

  • m=\frac{8\sqrt{3}}{3}
  • n  = 4√3 / 3

Therefore, option D is true.

3 0
2 years ago
Solve each equation you must use
n200080 [17]

1) The solution for m² - 5m - 14 = 0 are x=7 and x=-2.

2)The solution for b² - 4b + 4 = 0 is x=2.

<u>Step-by-step explanation</u>:

The general form of quadratic equation is ax²+bx+c = 0

where

  • a is the coefficient of x².
  • b is the coefficient of x.
  • c is the constant term.

<u>To find the roots :</u>

  • Sum of the roots = b
  • Product of the roots = c

1) The given quadratic equation is m² - 5m - 14 = 0.

From the above equation, it can be determined that b = -5 and c = -14

The roots are -7 and 2.

  • Sum of the roots = -7+2 = -5
  • Product of the roots = -7\times2 = -14

The solution is given by (x-7) (x+2) = 0.

Therefore, the solutions are x=7 and x= -2.

2) The given quadratic equation is b² - 4b + 4 = 0.

From the above equation, it can be determined that b = -4 and c = 4

The roots are -2 and -2.

  • Sum of the roots = -2-2 = -4
  • Product of the roots = -2\times-2 = 4

The solution is given by (x-2) (x-2) = 0.

Therefore, the solution is x=2.

5 0
3 years ago
Question is in the picture
Thepotemich [5.8K]

Answer:

$9.00

Step-by-step explanation:

If the price is at 30% discount, this means it is 100-30 = 70% of the original price.

70 \%  \ of \ original \ price = \$ 6.30\\\\\ original \ price = 6.30 \div 70 \%\\\\= 6.30 \times \frac{100}{70}\\\\=\frac{630}{70}\\\\= 9

Hence, original price is $9.00.

3 0
3 years ago
A class of 40 students elected a class president. There were 12 votes for Candidate A, and 18 votes for Candidate B. The rest of
mote1985 [20]
40  students
12-A
18-B 
40-12=28
28-18=10
10/40 did not vote.
25% did not vote
10 is one fourth of 40
fourth of 100% is 25%
7 0
2 years ago
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