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stich3 [128]
2 years ago
5

Plz answer quick! Will give brainiest! <3 No bull answers

Mathematics
1 answer:
Artemon [7]2 years ago
8 0

Answer:

D

Step-by-step explanation:

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an airplane flying at an elevation of 3,500 ft., directly above a straight highway. two motorists are driving cars on the highwa
rosijanka [135]

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

6 0
1 year ago
In the following proportion, what does y equal? A. 156 B. 13 C. 5.2 D. 1.4
Advocard [28]

Answer:

b

Step-by-step explanation:

4 0
2 years ago
Thomas Malthus, a political economist, showed that the human population would outstrip available resources unless kept in check
vredina [299]

Answer:

C. Darwin realized this also applied to plant and animal populations, and this struggle for existence resulted in an opportunity for natural selection to act on differences within populations.

Step-by-step explanation:

Thomas Malthus in his Malthusian theory of population concluded that since population increases geometrically and  resources only increase arithmetically, there will reach a point in time when the resources will be not be able to sufficiently cater for the population.

The Charles Darwin theory of Evolution is based on five key observations and conclusions drawn from them. These observations and inferences are summarized as:

  • Species are more fertile. They birth more offspring than can grow to adulthood.
  • Populations remain fairly stable with miniscule fluctuations.
  • Food resources are limited, but are relatively constant most of the time.

<em>Based off these observations, it is seen that there will be a </em><u><em>struggle</em></u><em> amongst the members of the specie for the </em><u><em>limited resources.</em></u>

  • In sexually reproducing species, generally no two individuals are identical. Variation is rampant.
  • Much of this variation is heritable.

<em>From the last two observations, the species that survive then pass on their traits to their offspring and the cycle repeats itself with each subsequent generation being </em><u><em>better evolved</em></u><em> than the previous ones.</em>

Thus, Darwin discovered that the Malthusian theory of population also applies to plant and animal populations where <u>scarcity of resources</u> gives room for <u>natural selection</u> to take place due to the variation within populations.

4 0
3 years ago
a party rental company has chairs and tables for rent. the total cost to rent 2 chairs and 6 table is $64. the total cost to ren
Dovator [93]
It cost 8 dollars to rent each chair and each table cost 4 dollars and 625 cents
6 0
3 years ago
Read 2 more answers
F(x) = -4x(2)+ 12x – 9
kenny6666 [7]

For this case we have the following function:

f (x) = - 4x ^ 2 + 12x-9

y = 0 we have:

-4x ^ 2 + 12x-9 = 0

Where:

a = -4\\b = 12\\c = -9

By definition, the discriminant of a quadratic equation is given by:

d = b ^ 2-4 (a) (c)

d> 0: Two different real roots

d = 0: Two equal real roots

d: Two different complex roots

Substituting the values we have:

d = (12) ^ 2-4 (-4) (- 9)\\d = 144-144

d = 0

We have two equal real roots.

To find the intersections with the x axis, we do y = 0:

-4x ^ 2 + 12x-9 = 0

We apply the quadratic formula:

x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}

Substituting the values we have:

x = \frac {-12 \pm \sqrt {12 ^ 2-4 (-4) (- 9)}} {2 (-4)}\\x = \frac {-12 \pm \sqrt {144-144}} {- 8}\\x = \frac {-12 \pm0} {- 8}\\x = \frac {-12} {- 8}\\x = \frac {3} {2}

The intersection with the x axis is(\frac {3} {2}, 0)

Answer:

d = 0

The intersection with the x axis is (\frac {3} {2}, 0)

5 0
3 years ago
Read 2 more answers
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