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ehidna [41]
3 years ago
10

How do you find the radius of a circle knowing the circumference

Mathematics
1 answer:
VladimirAG [237]3 years ago
5 0
C=2 pie r (example circumference=28) 28=2 x 22\7 x r 28=6.29r then divide both sides by 6.29 28\6.29=4.45 r=4.45
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Urgent two math help questions help needed!
lisabon 2012 [21]
For the first problem, the answer is choice A) 8
The notation "a32", with the "32" as a subscript, means "the address of row 3, column 2". The value that is in row 3, column 2 is the value 8. The row number is always listed first when it comes to addressing in matrices.

---------------------------------------------------------------------------------------

For the second problem, we can only add together matrix A and matrix D, as they are the same size (2x2 matrices). We cannot add any other pairs together because of the size mismatch. In order to add any two matrices, they must have the same number of rows and the same number of columns.

Another example would be adding two 3x1 matrices together. They both have 3 rows and 1 column. 
6 0
4 years ago
What is the relationship between the arc length and the radius of a circle when the central angle is defined in radians
Ket [755]
radians=\frac{arc\ length}{radius}
6 0
4 years ago
Ming took a cab across town. His fare was $22, and he leaves an 18% tip. What is the total amount ming pays the cab driver.
Aleks04 [339]

\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{18\% of 22}}{\left( \cfrac{18}{100} \right)22}\implies 3.96~\hfill \stackrel{\textit{total amount paid}}{22+3.96\implies 25.96}\\\hspace{34em}

8 0
3 years ago
Several different cheeses are for sale. The cheese comes in wedges
Tpy6a [65]

Answer:

39.30 cm^{2}

Step-by-step explanation:

The area of the top surface of the wedge is the same as the area of a sector.

Area of a sector = (θ/360^{o})\pir^{2}

where: θ is the central angle, and r is the radius.

Given that: central angle = 45^{o}, radius = 10 centimetre.

Area of the top surface = Area of a sector = (θ/360^{o})\pir^{2}

                                      = \frac{45^{o} }{360^{o} } x \frac{22}{7} x (10)^{2}

                                      = \frac{1}{8} x \frac{22}{7} x 100

                                      = 39.2857

                                     = 39.30 cm^{2}

The area of the top surface of the wedge is 39.30 cm^{2}.

3 0
3 years ago
Read 2 more answers
How many points of intersection are there between the graphs of the hyperbola and ellipse?
N76 [4]

The point of intersection is the point where two or more functions meet.

The graphs of the hyperbola and ellipse have 0 point of intersection

The given parameters are:

\mathbf{3x^2 - 4y^2 + 4x - 8y + 4 = 0}

\mathbf{3x^2 + y^2 + 4x - 3y + 4 = 0}

To determine the points of intersection, we simply equate both equations.

So, we have:

\mathbf{3x^2 + y^2 + 4x - 3y + 4 = 3x^2 - 4y^2 + 4x - 8y + 4 }

Cancel out the common terms

\mathbf{y^2 - 3y = - 4y^2 - 8y  }

Collect like terms

\mathbf{y^2 +4y^2= 3y   - 8y  }

\mathbf{5y^2= - 5y  }

Divide through by 5

\mathbf{y^2= - y}

Divide through by y

\mathbf{y= -1}

<em>The system of equation does not give room to calculate the x-coordinate at the x-axis.</em>

<em />

Hence, the graphs of the hyperbola and ellipse have <em>0 point of intersection</em>

Read more about points of intersection at:

brainly.com/question/13373561

4 0
3 years ago
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