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
lukranit [14]
3 years ago
15

A construction crew wants to hoist a heavy beam so that it is standing up straight. ey tie a rope to the beam, secure the base,

and pull the rope through a pulley to raise one end of the beam from the ground. When the beam makes an angle of 408 with the ground, the top of the beam is 8 ft above the ground. e construction site has some telephone wires crossing it. e workers are concerned that the beam may hit the wires. When the beam makes an angle of 608 with the ground, the wires are 2 ft above the top of the beam. Will the beam clear the wires on its way to standing up straight? Explain.
Mathematics
2 answers:
rusak2 [61]3 years ago
5 0

I don’t know the work but the correct answers for this problem are....

The length of the beam is 12.45ft, and the height of wires is 12.78ft.

Aliun [14]3 years ago
4 0
Interesting problem ...

The key is to realize that the wires have some distance to the ground, that does not change.

The pole does change. But the vertical height of the pole plus the distance from the pole to the wires is the distance ground to the wires all the time. In other words, for any angle one has:

D = L * sin(alpha) + d, where D is the distance wires-ground, L is the length of the pole, alpha is the angle, and 'd' is the distance from the top of the (inclined) pole to the wires:

L*sin(40) + 8 = L*sin(60) + 2, so one can get the length of the pole:

L = (8-2)/(sin(60) - sin(40)) = 6/0.2232 = 26.88 ft (be careful to have the calculator in degrees not rad)

So the pole is 26.88 ft long!

If the wires are higher than 26.88 ft, no problem. if they are below, the concerns are justified and it won't pass!

Your statement does not mention the distance between the wires and the ground. Do you have it?
You might be interested in
If BE is parallel to CD, the. The value of x is: <br><br> A. 10<br><br> B. 6<br><br> C. 9
sveta [45]
Corresponding sides have the same ratio, so
  x/15 = 12/(12+8) = 3/5
  x = 15*3/5
  x = 9
4 0
3 years ago
Write a real world situation for this in equality X is greater than or equal to nine.
gavmur [86]
Explain your question more
7 0
2 years ago
What is the area of this parallelogram?
kirza4 [7]

Answer:

132, (D)

Step-by-step explanation:

area = base * height

= (5 + 6) * 12 = 11 * 12 = 132

5 0
2 years ago
Read 2 more answers
The Fruit Juice Company sold 5,909,999,222 cans of juice last year. This
elixir [45]
A) 2000000000

5,909,999,222-3,999,002,135= 1,910,997,087 which is closest to answer A
5 0
1 year ago
Put the steps in order to show how to solve the equation 4y - 7 = 25
kumpel [21]

Answer:  E, A, D, C, B

Step-by-step explanation:

First, we need to get y alone. So we will add 7 to the side of the equation that has the 4y in it.

So the first one will be.

<em><u>Add 7 to both sides of the equation.</u></em>

Now the second one is

<em><u>4y = 25 + 7  </u></em>Because what you do to one side of the equation, you do to the other. So we add 7 to 25.

Then the 3rd one will be <u><em>4y = 32  </em></u>because 25+7 is equal to 32. But we still have that 4y on the other side of the equation. So the next equation is 4y = 32.

The second to last step is <em><u>Divide both sides by 4  </u></em>because thats

how you isolate y. So once you divide both sides by 4. You will get 8. Leading you into the next and final step.

<em><u>Y = 8</u></em>

And thats how you do it!

8 0
3 years ago
Other questions:
  • Sarah traveled 145 miles in<br> 2.5 hours. How fast was<br> Sarah driving?<br> Ma
    14·1 answer
  • PLEASE HELP
    14·2 answers
  • What is the soulution set of the equation 3x^2=48
    14·2 answers
  • What is 58/100 in a decimal
    10·1 answer
  • I dont get this at all somebody help
    12·1 answer
  • Find the area of the parallelogram below.
    8·2 answers
  • Need to know soon!!! 15 points?
    15·1 answer
  • Find the mean of 9.63, 9.75, 9.79, 9.80, 9.88, 9.94, 9.98, 11.99
    13·1 answer
  • There are 16 students working on a project if each student need 1/4 stick of clay are needed in all?
    6·1 answer
  • Given the points A(3, 1), B(6, y) and C(12, -2) find the value(s) of y if…
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!