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spayn [35]
2 years ago
6

A circular railroad-crossing sign has a diameter of 30 inches.

Mathematics
1 answer:
Angelina_Jolie [31]2 years ago
6 0

Diameter = 30

30/2 = 15 15 is the radius

To find area:

3.14 x 15 x 15 = 706.5

706.5 is the answer

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If anyone knows the answer to these can u please help? thank you! :)
Dennis_Churaev [7]

Answers:

  • A) Ray QS or Ray QR
  • B)  Line segment QS or SQ
  • C)  Plane QSR
  • D)  Line QS or RQ

=======================================================

Explanation:

Part A)

When naming a ray, always start at the endpoint. This is the first letter and we'll start with point Q.

The second letter is the point that is on the ray where the ray aims at. We have two choices S and R as they are both on the same ray. That's why we can name this Ray QS and Ray QR.

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

Part B)

A segment is named by its endpoints. The order of the endpoints doesn't matter so that's why segment QS is the same as segment SQ. To me, it seems more natural to read from left to right, so QS seems better fitting (again the order doesn't matter).

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

Part C)

When forming a plane, you need 3 noncollinear points. The term "collinear" means the points all fall on the same line. So these three points cannot all fall on the same straight line. In other words, we must be able to form a triangle of some sort.

So that's how we get the name "Plane QSR". The order of the letters doesn't matter.

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

Part D)

To name a line, we just need to pick two points from it. Any two will do. The order doesn't matter. So that's how we get Line QS and Line RQ as two aliases for this same line. It turns out that there are 6 different ways to name this line.

  1. Line QR
  2. Line QS
  3. Line RQ
  4. Line RS
  5. Line SQ
  6. Line SR
4 0
3 years ago
14tx=46;x=32 what's the answer?​
pickupchik [31]

First plug 32 in for x 14(32)t=46

Now solve for t

448t=46

T=46/448 which can be simplified to 23/224

3 0
3 years ago
Read 2 more answers
What is an equation of the line that passes through the points (-2,7) and (1, -8)?
ruslelena [56]
I’m just trying to ask another question .
3 0
3 years ago
The length of a side of an equilateral triangle is 10 inches. What is the length of an altitude of the triangle?
IrinaK [193]

The altitude of an equilateral triangle with side length a is \frac{a\sqrt{3}}{2}.


So, the length of the altitude is


10 \cdot \frac{\sqrt{3}}{2}= 5\sqrt{3}

3 0
3 years ago
Jim is shopping for a suit to wear to his friends wedding. He finds the perfect one on sale at 30% off. If the original price wa
aliya0001 [1]
Mp . 250
dis . 30%
sp = 250 - 30% of 250
sp = 175
8 0
3 years ago
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