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lara [203]
3 years ago
11

What is the exact circumference of a circle with a radius of 15 cm? 10πcm 15πcm 30πcm 60πcm WIIL GIVE BRAINLIEST

Mathematics
2 answers:
zhenek [66]3 years ago
7 0

Answer:

37 pi

Step-by-step explanation:

The circumference of a circle is equal to pi times the diameter.

The formula for the circumference of a circle is C=pi d,and since d = 37 ,we know that C=37 pi.

37 pi =116.238928183,but pi is irrational and the decimal will never end.

Thus,the most exact way to express the circumference is 37 pi.

ddd [48]3 years ago
5 0

Answer:

(C) 30πcm

Step-by-step explanation:

In order to find circumference you use the formula C (circumference)=2(pi)(r) in which r is the radius. In this case, two and 15 are thirty so to find the circumference all you have is the equation 30 times pi centimeters is equal to the Circumference.

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bulgar [2K]

Answer: There are 24 possible sequences of assembly.

Step-by-step explanation:

Since we have given that

Number of wires which need to be attached to a circuit board = 4

We need to find the number of possible sequences of assembly that must be tested.

Using multiplication rule of counting we get that,

Number of possible sequences of assembly is given by

4!\\\\=4\times 3\times 2\times 1\\\\=24

i.e. there are four choices for the first wire, three choices for the second wire, two choices for the third wire, one choice for the fourth wire.

Hence, there are 24 possible sequences of assembly.

6 0
3 years ago
XY bisects DF at point E. If DE=2y and EF=8y-3, find the value of DF​
nirvana33 [79]

Answer:

Step-by-step explanation:

If XY bisects DF at point E, then DE = EF.

Given DE = 2y and EF = 8y-3

2y = 8y-3

subtract 8y from both sides

2y-8y = 8y-8y-3

-6y = -3

y = 3/6

y = 1/2

y = 0.5

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DF= 2y+8y-3

DF = 10y - 3

DF = 10(0.5)-3

DF = 5-3

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7 0
2 years ago
What are the x- and y- intercepts of the graph of 9x-3y = 18?
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Step-by-step explanation:

9x - 3y = 18

Solve for y:

1. 3y= 9x + 18

2. y= 3x + 6 (This is the equation you will graph)  

To graph:  

Make a table for y = 3x +6.

If x =0, y=6

If x =1, y=9

If x =-1, y=3

You could get as many points as you like, however you need at least TWO, to be able to draw the line.

3 0
2 years ago
3. A regular pentagon has a perimeter of 10x + 15. What is the length of che side?
Ivan

Answer:

C

Step-by-step explanation:

A pentagon has 5 sides. Given that it is a regular pentagon, these 5 sides are equal.

The perimeter is the total length of all the sides of the pentagon. Since these 5 sides are all equal, we can divide the perimeter by 5 to obtain the length of a side of the pentagon.

Perimeter= 10x +15

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= (10x +15) ÷5

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3 years ago
Whats mc mean in mc2
Grace [21]

Answer:

the equation says that energy and mass (matter) are interchangeable; they are different forms of the same thing.

Step-by-step explanation:

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