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
Morgarella [4.7K]
3 years ago
6

A 45 foot ladders leaning up against a building. The base of the latter is 20 feet away from the building. What is the angle of

elevation to the top of the building

Mathematics
1 answer:
Tatiana [17]3 years ago
8 0

Answer:

The angle of elevation to the top of the building is 63.61 degrees

Step-by-step explanation:

Here, we want to calculate angle of elevation to the top of the building.

For this, we need a triangle

Please check for this in the attachment.

From the diagram, we are to calculate the angle theta.

To do this, we use trigonometric identities.

Looking at what we have, we have the hypotenuse and the adjacent.

So the trigonometric identity to use is the cosine

Mathematically Cosine theta = adjacent/hypotenuse

Thus, Cos theta = 20/45

Cos theta = 0.444444444444444

Theta = Arc cos(0.444444444444444)

Theta = 63.61 degrees

You might be interested in
HELP ME, FEE BWAINLY
victus00 [196]

Answer:

2w-5 > (with an underline that means more than or equal to) 18

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
What number must you add to complete the square? <br><br> x2 + 12x = -5
VARVARA [1.3K]
You must add 6 to complete the square. 
x^2+12x+(6)=-5(6)
7 0
3 years ago
8 freshmen, 9 sophomores, 9 juniors, and 7 seniors are eligible to be on a committee.
loris [4]

Answer: 11113200

Step-by-step explanation:

We know that , the number of combination of choosing r things from n things is given by :-

^nC_r=\dfrac{n!}{r!(n-r)!}

Then , the number of ways to choose a dancing committee if it is to consist of 4 freshmen, 5 sophomores, 2 juniors, and 3 seniors :-

Then , the number of ways to choose a dancing committee if it is to consist of 4 freshmen, 5 sophomores, 2 juniors, and 3 seniors :-

Then , the number of ways to choose a dancing committee if it is to consist of 4 freshmen, 5 sophomores, 2 juniors, and 3 seniors :-

^8C_4\times ^9C_5\times^9C_2\times^7C_3

=\dfrac{8!}{(8-4)!4!}\times\dfrac{9!}{(9-5)!5!}\times\dfrac{9!}{(9-2)!2!}\times\dfrac{7!}{3!(7-3)!}\\\\ =\dfrac{8\times7\times6\times5\times4!}{4!4!}\times\dfrac{9\times8\times7\times6\times5!}{4!5!}\times\dfrac{9\times8\times7!}{7!2!}\times\dfrac{7\times6\times5\times4!}{3!4!}\\\\=11113200

∴ The number of ways to choose a dancing committee if it is to consist of 4 freshmen, 5 sophomores, 2 juniors, and 3 seniors = 11113200

6 0
3 years ago
List four rational numbers between -2 and -1?​
rosijanka [135]

Answer:

See below.

Step-by-step explanation:

The 4 might be:

-1.9  - 3/2 , -1.8 and - 9/8.

8 0
3 years ago
given triangle abc is similar to triangle efg, with medians cd and gh respectively, ac=9, eg=6, cd=x+2, gh=2x-4. find the length
Leno4ka [110]

Answer:

X= 9//

Step-by-step explanation:

abc = efg

ac + cd = eg + gh

9 + (x+2) = 6 + (2x-4)

9 - 6 = 2x-4 - (x+2)

3 = x - 6

3+6 = x

9 = x//

3 0
2 years ago
Other questions:
  • SOMEONE HELP ME PLEASEEEEE
    13·2 answers
  • Find the solution of this system of equations 2x-4y=32 <br> 2x-8y=48
    11·1 answer
  • A Team won 24 games. This was 87% of the number played. How many games were played?
    7·1 answer
  • What are the factors of x^2- x - 6? Check all that apply.
    12·1 answer
  • The area of a rectangle is (x4 + 4x3 + 3x2 – 4x – 4), and the length of the rectangle is (x3 + 5x2 + 8x + 4). If area = length ×
    10·2 answers
  • 1/3 x (9/4 x 12) -3<br> solve this problem
    11·1 answer
  • Instructions: Solve the following literal equation.<br> Solve P-2w/2= l for P.
    7·1 answer
  • The ratio 5cm to 3m can be written in the form 1:n
    12·1 answer
  • Two functions are shown in the table below.
    13·1 answer
  • Please help me with this it’s hard
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!