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Hoochie [10]
3 years ago
14

Find the circumference of the circle below!

Mathematics
2 answers:
Alchen [17]3 years ago
4 0

Answer: 113.1in

The formula of finding the circumference is 2πr.

That being said, the radius is 18in.

Pi (π) is 3.14.

With all of that being said, we can multiply now.

2 × 3.14 × 18 = 113.09734 = 113.1

Hence 113.1 is the answer.

ale4655 [162]3 years ago
4 0

Answer: 113.1in

Step-by-step explanation:

2 × 3.14 × 18 = 113.1

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Answer is D
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6 0
2 years ago
It is a six-digit whole number.
pogonyaev

Answer:

212121.

Step-by-step explanation:

It is odd number so it ends in 1.

There are 3 2's and 3 1's which alternate.

Diivisible by 3 and 9

It is 212121.

8 0
2 years ago
On three examinations, you have grades of 85, 78, and 84. There is still a final examination, which counts as one grade In order
Greeley [361]

Answer:

  • It's not possible to earn an A in the course
  • I must have a 73 or MORE to earn a B in the course

Step-by-step explanation:

The average obtained at the end of the course will be:

\frac{85+78+84+x}{4} = av

Where x is the grade obtained in the final examination and av is the final average. To obtain an A, av has to be at least 90, av≥90, and to obtain an B, av has to be at least 80, av≥80

  • Is an A in the course possible?

So, if we get 100 on the final average:

x = 100,

av = (85+78+84+100)/4 = 86,75 and  86,75∠90.

<em>Answer: No, the higher grade obtained would be 86,75.</em>

  • What grade you must have in the final to earn a B in the course

To earn a B, av≥80:

av= \frac{85+78+84+x}{4 \ }\geq  80\\ \frac{247+x}{4}\geq80   \\247+x\geq 80*4\\ x\geq 320-247\\ x\geq 73

<em>Answer: I must have a 73 or MORE to earn a B in the course</em>

6 0
3 years ago
Help me ASAP please
Montano1993 [528]

Answer:  i feel that the coorect answer is b

6 0
3 years ago
Read 2 more answers
A jeweler wants to minimize business costs and has found that the average cost in dollars per necklace is given by C(x)=0.5x^2-7
Vika [28.1K]

Answer:

The maximum cost is 41 dollars per necklace.

Step-by-step explanation:

The average cost in dollars/necklace is given by :

C(x)=0.5x^2-7x+65.5  .....(1)

Where

x is the number of necklaces that are created

To maximize the cost, find the value of x by putting dC/dx = 0

\dfrac{d}{dx}(0.5x^2-7x+65.5)=0\\\\x-7=0\\\\x=7

Now put the value of x = 7 in equation (1).

C(x)=0.5(7)^2-7(7)+65.5\\\\=41\ \text{dollars per necklace}

Hence, the maximum cost is 41 dollars per necklace.

8 0
3 years ago
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