1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
postnew [5]
3 years ago
9

A migrating bird flies 312 miles in 13 hours. How many miles does it fly in 5 ​hours?

Mathematics
1 answer:
irinina [24]3 years ago
4 0
The answer is 120 miles , because it is a proportion 
You might be interested in
In the number 5,782,143 which digit is the ten thousandth place?
Marizza181 [45]

Answer:

The 80,000

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Solve for s. 121&gt;11s<br><br><br> Solve for s. 121&gt;11s<br><br> 1)11=s<br> 2)11&gt;s<br> 3)11 s
dangina [55]
The answers is

3). 11s
5 0
2 years ago
Read 2 more answers
Please PLEASE HELP me
Phantasy [73]
It has to be the first one
6 0
3 years ago
Read 2 more answers
Ex 7) Imagine a mile-long bar of metal such as the rail along railroad tracks. Suppose that the rail is anchored on both ends an
Fantom [35]

9514 1404 393

Answer:

  about 44.5 feet

Step-by-step explanation:

We can write relations for the height of the rail as a function of initial length and expanded length, but the solution cannot be found algebraically. A graphical solution or iterative solution is possible.

Referring to the figure in the second attachment, we can write a relation between the angle value α and the height of the circular arc as ...

  h = c·tan(α) . . . . . . where c = half the initial rail length

Then the length of the expanded rail is ...

  s = r(2α) = (c/sin(2α)(2α) . . . . . . where s = half the expanded rail length

Rearranging this last equation, we have ...

  sin(2α)/(2α) = c/s

It is this equation that must be solved iteratively. We find the solution to be ...

  α ≈ 0.0168538794049 radians

So, the height of the circular arc is ...

  h = 2640.5·tan(0.0168538794049) ≈ 44.4984550191 . . . feet

The rail will bow upward by about 44.5 feet.

_____

<em>Additional comments</em>

Note that s and c in the diagram are half the lengths of the arc and the chord, respectively. The ratio of half-lengths is the same as the ratio of full lengths: c/s = 2640/2640.5 = 5280/5281.

We don't know the precise shape the arc will take, but we suspect is is not a circular arc. It seems likely to be a catenary, or something similar.

__

We used Newton's method iteration to refine the estimate of the angle from that shown on the graph. The iterator used is x' = x -f(x)/f'(x), where x' is the next guess based on the previous guess of x. Only a few iterations are required obtain an angle value to full calculator precision.

3 0
3 years ago
<img src="https://tex.z-dn.net/?f=13%20%5Ctimes%2011%20%3D%3F" id="TexFormula1" title="13 \times 11 =?" alt="13 \times 11 =?" al
gizmo_the_mogwai [7]
13 multiplied by 11 is 143
7 0
3 years ago
Other questions:
  • -1/2 x+1 = -x+8<br><br> choices:<br> 7<br> 1/2<br> 14<br> 18
    11·2 answers
  • PLEASE HELP What is the range of this function? -1, -4, 4, 1, 8, 7, 18, 15
    5·2 answers
  • WILL GIVE 5 STARS TO THOSE WHO ANSWER WITH AN EXPLANATION! Greg is purchasing ink cartridges for his computer. Each ink cartridg
    7·2 answers
  • The temperature was -13°F and then rose 9°F. Enter the addition expression that represents the final temperature.
    7·1 answer
  • Kyle is pulled back on a swing so that the rope forms an angle of 30° with the vertical. The distance from the top of the swing
    13·1 answer
  • How many times does 8 go into 12?
    8·1 answer
  • This list shows the ingredients needed to make 12 flapjacks.
    5·1 answer
  • What is 20% off of 113.83?
    7·2 answers
  • Number of Packets
    10·1 answer
  • Please help asap!!!!!!!!!!!!!!!!!!!!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!