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PSYCHO15rus [73]
3 years ago
6

What is the arc length when theta=2 pi/5 and the radius is 6 cm

Mathematics
1 answer:
Crank3 years ago
7 0

Answer:

The length of the arc is 7.536cm

Step-by-step explanation:

To solve this problem we need to use the circumferenc formula of a circle:

c = circumference

r = radius = 6cm

π = 3.14

c = 2π * r

we replace with the known values

c = 2 * 3.14 * 6cm

c = 37.68cm

The length of the circumference is 37.68cm

Now we calculate the fraction that corresponds to this arc with the rest of the circumference

(2 pi /5) / (2pi) = 1/5

now we multiply the circumference by the fraction

37.68cm  * 1/5 = 7.536cm

The length of the arc is 7.536cm

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Monica has a triangular piece of fabric. The height of the triangle is 27 inches and the triangle's base is 18 inches. Monica sa
Fed [463]
Monica forgot to multiply by 1/2
The area of the fabric is 243 in.2

Explanation:
The formula for the area of a triangle is:
1/2 • base • height

Monica’s error is that she only multuplied the base and height, without multiplying 1/2 also.

The area of the fabric is 243 in.2 because:
1/2 • 18 • 27 = 243

Or you could just divide the wrong area Monica solved (486 in2) by 2. You will also get 243 in.2

Have a nice day! And mark me brainliest please!
5 0
3 years ago
One dozen eggs cost $1.98 if the charge is $11.88 how many dozens were purchased
Kazeer [188]

6 dozen were purchased

divide the charge by the cost of one dozen

number purchased = \frac{11.88}{1.98} = 6



3 0
3 years ago
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Thirty eight of the students in the Explorers Club are boys. If there are 95 students in the Explorers Club, how many are girls?
Mila [183]

Answer:

57

Step-by-step explanation:

Subtract 38 from 95 to get 57

7 0
4 years ago
Pls help me give u a brainlest
Snezhnost [94]

Answer:

2,139

Step-by-step explanation:

Volume= length X Width X Height

L= 15.5 cm

W= 9.2 cm

H= 15

L X W X H= ?

15.5 X 9.2 X 15=?

2,139

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3 years ago
How many total roots are must there be in this function explain how you know<br> H(x)=x3-7x2-x+7
Leona [35]

Answer:

total 3 roots,

How do I know?:

put this function in graphing calculator

And if you don't have a graphing calculator, then calculate it out bu yourself:

(x + 1)(x − 1)(x − 7) = 0

3 0
4 years ago
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