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
Citrus2011 [14]
1 year ago
12

an airplane flying at an elevation of 3,500 ft., directly above a straight highway. two motorists are driving cars on the highwa

y on opposite sides of the plane. the angle of depression to one car is 31 degrees and to the other is 53 degrees. how far apart are the cars?
Mathematics
1 answer:
rosijanka [135]1 year ago
6 0

The first and second cars are 7724 feet apart from each other.

The angle of depression is the angle we have to move your eyes downwards to look at the car from the plane. Let's start with the first car, with the 31° angle of depression. Draw an upside-down right triangle with vertices at the plane, the car, and the point 3500 feet in the air above the car (level with the plane). The vertex at the plane is 31° and the right angle is the vertex in the air above the car. The length of the leg from the car to the point in the air above the car is 3500 feet. We like to find the length of the leg from the plane to the point in the air above the car. Since the two sides involved are the legs of the triangle, use tangent:

     tan = opposite/ adjacent

⇒  tan(31°) = 3500/x

⇒ 0.60086 = 3500/x

⇒ 0.67 x = 3500            [ rounding up 0.60086 = 0.67]

⇒ x = 5223.88

That means the first car is 5223.88 feet from the point on the highway below the plane.

We can do something similar with the second car, which has an angle of depression of 53° from the plane. Again, the leg from the car to the point in the air above the car (level with the plane) is 3500 feet, the right angle is at the vertex at the point in the air above the car, and the 53° angle is at the vertex at the plane. We are looking for the length of the other leg, which runs from the plane to the point in the air above the car. Use tangent:

    tan(53°) = 3500/x

⇒ 1.327 = 3500/x

⇒ 1.4x = 3500            [ rounding 1.327 = 1.4]

⇒ x = 3500/1.4
⇒ x = 2500

That means the second car is 2500 feet from the point on the highway below the plane.

Add the two distances together to get the total distance from car to car:

5223.88 + 2500.00 = 7723.88

So, rounded to the nearest foot, the cars are 7724 feet apart.

Learn more about Vertex:

brainly.com/question/29030495

#SPJ4

You might be interested in
Nina thought of a number. She called her number y. She added 14 to her number, divided the result by 6, and she got 12. What was
Shalnov [3]
Y=58

y/6=12
y=72
72-14=58

3 0
3 years ago
If a light bulb manufacturing company wants to​ estimate, with 99​% ​confidence, the mean life of compact fluorescent light bulb
Reptile [31]

Answer:

We need at least 217 compact fluorescent light bulbs

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

How many compact fluorescent light bulbs need to be​ selected?

We need at least n bulbs, in which n is found when M = 175, \sigma = 1000

So

M = z*\frac{\sigma}{\sqrt{n}}

175 = 2.575*\frac{1000}{\sqrt{n}}

175\sqrt{n} = 2575

\sqrt{n} = \frac{2575}{175}

\sqrt{n} = 14.71

\sqrt{n}^{2} = (14.71)^{2}

n = 216.5

We need at least 217 compact fluorescent light bulbs

4 0
3 years ago
Read 2 more answers
A store is having a 15% off sale on all shirts. When Suri checks out, the clerk takes $4.50 off the original price of the shirt.
Nastasia [14]

Answer: $30

Step-by-step explanation:

Starting with the original formula, you can solve for the cost of the shirt.

First, convert the percentage to a decimal - 15% = .15, and then plug it into the formula:

.15x = $4.50

In order so solve this you need to divide both sides by .15:

X = $30

5 0
3 years ago
One British pound was worth 1.5761 Canadian dollar.If a hotel room coat 126 pounds,what must be paid in Canadian dollars.​
Kamila [148]

Answer:

198.5886   or technically 198.58 or 198.59 because you can't have a decimal of a penny.

Step-by-step explanation:

One British pound was worth 1.5761 Canadian dollar, meaning that every pound needed is worth 126 Canadian dollar.

That means you can multiply 1.5761 by 126 to get the Canadian dollar price.

126 x 1.5761 = 198.5886

198.5886 is the Canadian price

6 0
3 years ago
Read 2 more answers
The school makes $0.75 profit on each bag sold and excepts to sell 1,200 bags next month. Based on last month’s results, how muc
zloy xaker [14]
Here is the results 625



Divide 0.75 by 1,200. And estimate. Then take it from the end.
8 0
3 years ago
Other questions:
  • How many ways can eight boxes be arranged on a shelf?
    7·1 answer
  • What do you get when you put 1 and 1 together?!!?
    12·1 answer
  • Zoe wrote 3/5 of her essay in 30 minutes. Assuming she wrote the paper at a constant rate the entire time, which expression can
    8·1 answer
  • Sarah enjoys cutting lawns and charges $20 for each small lawn and $30 for each large lawn. Sarah earned $140 for mowing 6 yards
    12·1 answer
  • How do you find the original price when given the sale price and the percent of the discount
    11·1 answer
  • PLEASE HELP GRADE IN MATH IS REALLY LOW IM STUPID. Question 1 (Multiple Choice Worth 5 points)
    8·1 answer
  • Which of the following statements is true? A. sin(j)>cos(L) B. sin(L)
    15·1 answer
  • suris age is 4 less than 3 times her cousins age. suri is 17 years old. which method can be used to find c, her cousins age?
    9·1 answer
  • Select the correct answer.
    7·1 answer
  • 600 can be written as 2 × b × co
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!