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Contact [7]
3 years ago
15

A certain coin is a circle with diameter 18 mm. What is the exact area of either face of the coin in term of

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
6 0
To find the area of the coin/a circle we use this equation:
(a = area, r = radius, d = diameter)

a = r²

So we need to do for the radius.
r = d/2
r = 18/2
r = 9

Then solve
a = 9²
a = 81

The correct answer is 81.

Hope this helped! If you have anymore questions or don't understand, please comment or DM me. :)
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-90d = 9 What is d??
qaws [65]
D= -10
explanation:
-90/9=-10
8 0
3 years ago
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A circle is cut from a square piece of cloth, as shown: A square, one side labeled as 42 inches has a circle inside it. The circ
olasank [31]

Answer:

\huge\boxed{\sf Area\ of\ the\ circle = 1385.4\ in.\²}

Step-by-step explanation:

We have to find out the area of the square in order to find how many square inches were cut from the squared cloth.

Diameter = 42 in.

Radius = D / 2 = 42 / 2 = 21 in.

Area of circle = πr²

Where r = 21 in.

Area = (3.14)(21)²

Area = (3.14)(441)

Area of the circle = 1385.4 in.²

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>

3 0
3 years ago
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Find the coordinates of the transformed image when the pre-image is reflected over the line x=2
zepelin [54]
A’= (10,1)
B’= (8,1)
C’= (9,5)
D’= (7,5)

hope this helps!
8 0
3 years ago
Please help ASAP THIS IS MY FINAL QUESTION!!!! 20 points!!!!
givi [52]

Answer:

y= 1/2x-3

Step-by-step explanation:

2y - x = 8

First find the slope

2y = x+8

Divide by 2

2y/2 = x/2 +8/2

y = 1/2 x +4

The slope is 1/2  ( y=mx+b where m is the slope and b is the y intercept)

When lines are parallel they have the same slope)

Using y = mx+b

y =1/2x+b

Substituting the point (4,-1) into the equation

-1 =1/2(4)+b

-1 = 2+b

-3 =b

The equation of the line is

y= 1/2x-3

4 0
2 years ago
6^2+17+12 help me plz.
Dmitry_Shevchenko [17]
6^2 + 17 + 12

First, let's start with 6^{2} . Basically, the '2' above the 6 indicates that the number appears twice in multiplying. 6^{2} can be described as 6 × 6 as well. 36 should be your answer for 6 squared.
6^{2} = 6 \times 6 = 36

Second, our problem should look like: 36 + 17 + 12. One can simply do this on a calculator or count on their fingers. Once you add all of the numbers up, you should get 65.

Answer: \fbox {65}
4 0
2 years ago
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