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guajiro [1.7K]
3 years ago
13

I suck at circles, but help?:)

Mathematics
2 answers:
posledela3 years ago
5 0

Answer:

A

Step-by-step explanation:

Formula for circumference is 2πr=C

80/2 gives you the radius which is 40.

40×2=80

pi=3.14

80×3.14=251.2 which is 251 or A

fredd [130]3 years ago
4 0
The answer is the first

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A cell tower has the hieght of 70 meters. The Tower casts a shadow of 45 meters on the ground. What is the angle of elevation of
laiz [17]

Answer:

\theta=0.99^{\circ}

Step-by-step explanation:

Given that,

The height of a cell tower, P = 70 m

The tower casts a shadow of 45 meters on the ground.

We need to find the angle of elevation of the shadow to the top of the cell tower. We can use trigonometry to find it.

\tan\theta=\dfrac{P}{B}

Put all the values,

\tan\theta=\dfrac{70}{45}\\\\\theta=\tan^{-1}\left(\frac{70}{45}\right)\\\\\theta=0.99^{\circ}

Hence, the angle of elevation is equal to 0.99^{\circ}.

4 0
3 years ago
Please help I don't understand what to do
Strike441 [17]

Truth statement are statements or assertions that is true regardless of whether the constituent premises are true or false. See below for the definition of Euclidean Postulates.

<h3>What are the Euclidean Postulates?</h3>

The five Euclidean Postulates are;

1. Any two points can be joined by a straight line segment.

2. In a straight line, any straight line segment can be stretched indefinitely.

3. A circle can be formed using any straight line segment as the radius and one endpoint as the center.

4. Right angles are all the same.

5. If two lines meet a third in a way that the sum of the inner angles on one side is smaller than two Right Angles, the two lines will inevitably collide on that side if they are stretched far enough.

The truth statements relating to the attached pictures and their equivalent Euclidean Axiom are;

a) The right angle in the first page of the book shown and the right angles in the last page of the book shown are all the same. (Postulate 4);

b) If the string from the Yoyo dangling from hand in the picture is rotated for 360° such that the length of the string remains equal all thought, and the point from where is is attached remains fixed, it will trace a circular trajectory. (Postulate 3)

c) The swords held by the fighters can be extended into infinity because they are straight lines (Postulate 5)

Read more about Euclidean postulate at; brainly.com/question/17304015

#SPJ1

8 0
2 years ago
Twenty-seven of the 90 acres were planted with alfalfa. What percent of the acres was not planted with alfalfa?
9966 [12]

Answer:

70 percent

Step-by-step explanation:

Find how many acres were not planted with alfalfa by subtracting 27 from 90:

90 - 27

= 63

Find what percent this is by dividing it by 90:

63/90

= 0.7

So, 70 percent of the acres weren't planted with alfalfa.

7 0
3 years ago
1. The radius of a circle is 26 yards. Find the diameter
svetlana [45]

Answer:

52 yards

Step-by-step explanation:

The radius is half of the diameter so multiply 26 by 2 to get the diameter.

3 0
3 years ago
Read 2 more answers
NEED HELP WITH
Fed [463]
Let the average profit or loss in year 2006 be x millions, 


The average profit for the 8-year period, is the total sum of the profits (or losses) of each year, divided by 8:

so we have:

\displaystyle{ \frac{3.40+2.10+x+0.60+2.10+0.20+1.30+0.75}{8}=1

\displaystyle{\frac{10.45+x}{8}=1

10.45+x=8

x=8-10.45=-2.45


Answer: the loss in 2006, was 2.45 million dollars

3 0
4 years ago
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