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
telo118 [61]
3 years ago
11

a railroad track rises 30feet for every 400 feet of track. what is the measure of the angle of elevation of the track?

Mathematics
2 answers:
mixas84 [53]3 years ago
7 0

Answer:

Step-by-step explanation:

It is given that a railroad track rises 30 feet for every 400 feet of track.

Thus, from the figure, we have

AB=30 feet and BC=400 feet

Therefore, using the trigonometry, we have

\frac{AB}{BC}=tanC

\frac{30}{400}=tanC

\frac{3}{40}=tanC

0.075=tanC

C=tan^{-1}(0.075)

C=4.3^{\circ}

Thus, the measure of the angle of elevation of the track is C=4.3^{\circ}.

tensa zangetsu [6.8K]3 years ago
4 0
It will be 0.075 the tracks
You might be interested in
Use lagrange multipliers to find the shortest distance, d, from the point (4, 0, −5 to the plane x y z = 1
Varvara68 [4.7K]
I assume there are some plus signs that aren't rendering for some reason, so that the plane should be x+y+z=1.

You're minimizing d(x,y,z)=\sqrt{(x-4)^2+y^2+(z+5)^2} subject to the constraint f(x,y,z)=x+y+z=1. Note that d(x,y,z) and d(x,y,z)^2 attain their extrema at the same values of x,y,z, so we'll be working with the squared distance to avoid working out some slightly more complicated partial derivatives later.

The Lagrangian is

L(x,y,z,\lambda)=(x-4)^2+y^2+(z+5)^2+\lambda(x+y+z-1)

Take your partial derivatives and set them equal to 0:

\begin{cases}\dfrac{\partial L}{\partial x}=2(x-4)+\lambda=0\\\\\dfrac{\partial L}{\partial y}=2y+\lambda=0\\\\\dfrac{\partial L}{\partial z}=2(z+5)+\lambda=0\\\\\dfrac{\partial L}{\partial\lambda}=x+y+z-1=0\end{cases}\implies\begin{cases}2x+\lambda=8\\2y+\lambda=0\\2z+\lambda=-10\\x+y+z=1\end{cases}

Adding the first three equations together yields

2x+2y+2z+3\lambda=2(x+y+z)+3\lambda=2+3\lambda=-2\implies \lambda=-\dfrac43

and plugging this into the first three equations, you find a critical point at (x,y,z)=\left(\dfrac{14}3,\dfrac23,-\dfrac{13}3\right).

The squared distance is then d\left(\dfrac{14}3,\dfrac23,-\dfrac{13}3\right)^2=\dfrac43, which means the shortest distance must be \sqrt{\dfrac43}=\dfrac2{\sqrt3}.
7 0
3 years ago
There are 460 students enrolled at freedom academy. 40 percent of the students are male. How many males attend Freedom academy?
arsen [322]

Answer:

184

Step-by-step explanation:

convert percentage into decimal:

40% = 40/100 = 0.4

Therefore 40% of 460 = 0.4 x 460 = 184

8 0
3 years ago
Read 2 more answers
Based on the data in the two-way table, the probability of being 25-35 years and having a hemoglobin level above 11 is __ a.29 b
Alina [70]

The probability of being 25-35 years and having a haemoglobin level above 11 is 34%.

The probability of having a haemoglobin level above 11 is 36%.

Being 25-35 years and having a hemoglobin level above 11 are not dependent on each other.

<h3>What are the probabilities?
</h3>

Probability determines the odds that a random event would occur. The odds of the event happening lie between 0 and 1.

The probability of being 25-35 years and having a haemoglobin level above 11 = number of people between 25 - 35 that have a level above 11 / total number of people between 25 - 35

44 / 128 = 34%

The probability of having a haemoglobin level above 11  = number of people with a level above 11 / total number of respondents

153 / 429 = 36%

To learn more about probability, please check: brainly.com/question/13234031

#SPJ1

4 0
2 years ago
A Web music store offers two versions of a popular song. The size of the standard version is 2.5 megabytes (MB). The size of the
Varvara68 [4.7K]

Answer:

650

Step-by-step explanation:

lets say the # of standard version is x and the # of high-quality version is y

x+y=1060

2.5x+4.8y=3593

solve the system

y=410

x=650

8 0
3 years ago
3. Write an equation for the model below.
Korvikt [17]

Answer:

0

Step-by-step explanation:

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

+0

+1

+2

+3

+4

+5

+6

+7

+8

+9

+10



5 0
3 years ago
Other questions:
  • What is 10 1/3 as a improper fraction and show your if you can.
    5·1 answer
  • You worked the following hours this week: Monday 8 AM to 5 PM, Tuesday 9 AM to 3 PM, Thursday 8:30 AM to 2:15 PM. You get a 30-m
    7·2 answers
  • Write 36.28 in word form
    5·2 answers
  • 3. Solve for y: -5x + 2y = 14
    11·2 answers
  • What is the volume of a frustum of a right pyramid with the area of the lower base square to 100 square inches, the area of the
    15·1 answer
  • Jose wants to pay off his credit card balances within 18 months. He is trying to decide if he should use his $1,750 in
    9·2 answers
  • Can someone give me the answer plz.
    15·1 answer
  • Factor the following.
    6·2 answers
  • Help is very much appreciated!
    8·2 answers
  • Suppose you are an aerospace engineer. It is your job to design a new type of fighter jet, and you have already been given a mod
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!