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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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Which is the image of (-2, -5) reflected across X=2? <br> (-6, 5) <br> (-2,9) <br> (6,-5) <br> (2,9)
Sedbober [7]

Answer:

(6,-5)

Step-by-step explanation:

As the point is 4 units to the left of X=2, the reflection must be 4 units to the right of X=2

4 0
3 years ago
The long-distance calls made by the employees of a company are normally distributed with a mean of 6.3 minutes and a standard de
Sergio [31]

To solve this problem, we use the formula:

z = (x – u) / s

where z is the z score value which can be obtained from the tables, x is the sample value, u is the mean = 6.3 min, and s is the std dev = 2.2 min

 

at P value = 0.90, the z = 1.28, finding for x:

x = z s + u

x = 1.28 * 2.2 + 6.3

x = 9.116

 

at P value = 1.0, the z = 3.49, finding for x:

x = z s + u

x = 3.49 * 2.2 + 6.3

x = 13.978 ~ 14

 

Therefore the longest 10% calls last about 9.1 minutes to 14 minutes

3 0
4 years ago
I need someone to solve this problem for me please
Amiraneli [1.4K]
First, solve the area of the entire large rectangle (28)(45) = 1260
Next, find the area of the chunk that is cut out (11)(15) = 165
- we know the width is 15 because 45 - 6 - 24
Subtract the cut out piece from the overall rectangle 1260 - 165 = 1095
7 0
3 years ago
Read 2 more answers
5x+3y=9 in standard form
tamaranim1 [39]
The standard for is Y=-5/3x +3
8 0
3 years ago
What is 27% as a fraction in the simplest
Norma-Jean [14]

Answer:

0.27

explanation

<u>27</u>

100

8 0
3 years ago
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