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Nitella [24]
3 years ago
10

A light-year is the distance that light travels in one year. the speed of light is 3.00 × 108 m/s. how many miles are there in o

ne light-year? (1 mi = 1609 m, 1 y = 365 d)
Mathematics
1 answer:
Leya [2.2K]3 years ago
6 0
One of the basic equations in physics is Speed = Distance/Time. Thus,

Distance = Speed*Time

Time = 1 light-year * 365 days/yr * 24 h/day * 3,600 s/h = 31536000 seconds
Distance = (3×10⁸ m/s)*(31536000 s) = 9.4608×10¹⁵ meters

Convert meters to miles:
Distance = 9.4608×10¹⁵ m * 1 mile/1,609 m = 5.88×10¹² miles
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Anyone know how to find the area of an equilateral triangle circumscribed about a circle, given the radius of the circle?
tia_tia [17]
Warning: This might be rough...
First draw it out. Label the angles at the corners of the triangle 60 (definition of equilateral triangles). Now draw a line from the center of the circle to the corner, splitting the corner in half. Label this line R and a corner as 30 degrees. No to find the height of this triangle, you do rsin(30). The base of this triangle is 2rcos(30). Now find the area of this mini triangle (rsin(30)*2rcos(30)/2=r/2*rsqrt(3)/2=r^2sqrt(3)/4). Now multiply this by 3 because you have 3 mini triangles... to get...
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8 0
2 years ago
PLZ make me a favor of answering this. I tried it just that I don´t get it
Anni [7]

Answer:

1 is 8

2 is 42

3 is 4

4 is 64

5 is 6

6 is 6

7 is 8

8 is 2

9 is 10

10 is 9

I don't know about 11 or 12 but here is 1-10

7 0
3 years ago
How do I simplify this
velikii [3]
512x^3 would be the answer 
7 0
3 years ago
There are 200 students in the 8th grade class at Alleghany Middle School. Of these students, 8% play basketball and 14% play soc
sergeinik [125]

Answer:

The probability that a student plays either basketball or soccer is 19% or 0.19.

Step-by-step explanation:

Let A be the event that student play basketball and  B be the event that student play soccer.

P(A)=8\%

P(B)=14\%

It is given that 6 students play on both teams.

P(A\cap B)=\frac{6}{200}\times 100=3\%

We have to find the probability that a student plays either basketball or soccer.

P(A\cup B)=P(A)+P(B)-(A\cap B)

P(A\cup B)=8\%+14\%-3\%

P(A\cup B)=19\%

Therefore the probability that a student plays either basketball or soccer is 19% or 0.19.

6 0
3 years ago
What is the value of a in the equation 3 a plus b equals 54, when b equals 9?
NikAS [45]

Answer:

a = 15

Step-by-step explanation:

Given

3a + b = 54 ← substitute b = 9

3a + 9 = 54 ( subtract 9 from both sides )

3a = 45 ( divide both sides by 3 )

a = 15

5 0
3 years ago
Read 2 more answers
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