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Luba_88 [7]
4 years ago
7

Could someone help me figure out the scientific notation, thank you!

Mathematics
1 answer:
Lady bird [3.3K]4 years ago
8 0
It's 4.35 • 10^-4 becuase you move the decimal place to the left four places
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14. A boy is standing on the top of a tower, observed that the angle of depression of a car on the horizontal ground is 60". On
qaws [65]

The height of the tower is 331.3 meters

The distance from the car to the foot of the tower is 191.3 meters

The situation forms a right angle triangle.

<h3>Right angle triangle:</h3>

Right angle triangle has one of its angles as 90 degrees. Therefore,

The height of the tower is the opposite side of the right angle triangle. The distance from the foot of the tower to the car is the adjacent side of the triangle formed.

Therefore, the following trigonometric can be formed from the relationship.

let

x = adjacent side = distance from the foot of the tower to the car.

Therefore,

x=\frac{140 + h}{tan60}=\frac{h}{tan45}

cross multiply,

(140 + h)(tan 45) = h tan 60

140 tan 45 + h tan 45 = h tan 60

140 tan 45  =  h tan 60 -  h tan 45

140 = h√3 - h

140 = 1.732h - h

140 = 0.732h

h = 140 / 0.732

h = 191.256830601

h = 191.3

Therefore,

height of the tower = 140 + 191.3 = 331.3

The distance from the car to the foot of the tower is as follows;

  • x = 191.3 / tan 45

x = 191.3 / 1

x = 191.3

Therefore, the distance from the car to the foot of the tower is 191.3 meters

learn more on right triangle here; brainly.com/question/26750565?referrer=searchResults

3 0
3 years ago
How many times larger is the value of 150,000 than 150?
stiks02 [169]
1,000 times larger! You're welcome :) All you do it divide the two. Hope this helped!
4 0
3 years ago
Read 2 more answers
1.) -4(n-7)+4n=-8-3(n-5)<br><br> 2.) 4(-8n+10)+4(4n-4)=-6n+2n
Assoli18 [71]

Answer:

\huge\boxed{1)\ n=-7}\\\boxed{2)\ n=2}

Step-by-step explanation:

1)\\-4(n-7)+4n=-8-3(n-5)\\\\\text{use the distributive property}\ a(b+c)=ab+ac\\\\(-4)(n)+(-4)(-7)+4n=-8+(-3)(n)+(-3)(-5)\\\\-4n+28+4n=-8-3n+15\\\\\text{combine like terms}\\\\(-4n+4n)+28=-3n+(-8+15)\\\\28=-3n+7\\\\\text{subtract 7 from both sides}\\\\28-7=-3n+7-7\\\\21=-3n\\\\\text{divide both sides by (-3)}\\\\\dfrac{21}{-3}=\dfrac{-3n}{-3}\\\\-7=n\to\boxed{n=-7}

2)\\4(-8n+10)+4(4n-4)=-6n+2n\\\\\text{use the distributive property}\\\\(4)(-8n)+(4)(10)+(4)(4n)+(4)(-4)=-6n+2n\\\\-32n+40+16n-16=-6n+2n\\\\\text{combine like terms}\\\\(-32n+16n)+(40-16)=(-6n+2n)\\\\-16n+24=-4n\\\\\text{add}\ 16n\ \text{to both sides}\\\\-16n+16n+24=-4n+16n\\\\24=12n\\\\\text{divide both sides by 12}\\\\\dfrac{24}{12}=\dfrac{12n}{12}\\\\2=n\to\boxed{n=2}

6 0
4 years ago
Read 2 more answers
The ratio of boys to girls in a class is 4 to 5. There are 20 boys in the class. How many girls are in the class
skelet666 [1.2K]

There would be 25 girls. You would turn it into a fraction and times both by 5 to get 20/25. 5/4=1.25 and 25/20=1.25 in case you need to check your work

8 0
3 years ago
If you start with Malvin’s age, take half of it, increase that result by 5, then divide by 3, and finally double that, you get 8
Kisachek [45]

Answer:

24 years old

Step-by-step explanation:

Let Malvin's age be x.

  • x / 2
  • x / 2 + 5 = 5x / 10  [ By taking the L.C.M.]
  • ( 5x / 10 ) * ( 1 / 3 ) = 5x / 30   [ Multiply with the reciprocal of 3 ]
  • ( 5x / 30 ) * 2 = 5x / 15

Now let's solve the equation,

5x / 15 = 8

       5x = 8 * 15

       5x = 120

         x = 120 / 5

         x = 24

Therefore, Malvin is 24 years old.

Hope yo liked the answer!!

If you found it helpful, please mark it as the Brainliest!!

3 0
3 years ago
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