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Mrrafil [7]
4 years ago
14

PLEASE someone help me!!! I will brainliest!!!

Mathematics
1 answer:
Katarina [22]4 years ago
5 0

Answer:

  BC = 20.225

Step-by-step explanation:

Call the point on CD where the triangle vertex is point X.

Then we have ...

  BC·tan(20°) = CX

  DE·tan(25°) = DX

  CX +DX = AB

  AB·tan(20°) = AE

  AE +DE = BC

Now we can write BC in terms of itself:

  BC = AE +DE = AB·tan(20°) +DE

  BC = (CX +DX)·tan(20°) +DE = (BC·tan(20°) +DE·tan(25°))·tan(20°) +DE

  BC(1 -tan(20°)²) = DE(1 +tan(25°)·tan(20°))

  BC = DE(1 +tan(25°)·tan(20°))/(1 -tan(20°)²) . . . . where DE = 15 cm

  BC ≈ 20.225 cm

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The annual expenditure of the US federal government is approximately 4 44 trillion dollars. If a one dollar bill is 0 . 0 0 0 1
kaheart [24]

Answer:

<em>A stack of 4 trillion one dollar bills will be  4\times 10^8 meters.</em>

Step-by-step explanation:

The annual expenditure of the US federal government is approximately 4 trillion dollars.

We know,  1 trillion dollars = 10¹² dollars.

So,  4 trillion dollars =(4\times 10^1^2) dollars.

Each one dollar bill is 0.0001 meters thick.

So, the total height of the stack of 4 trillion one dollar bills will be.....

[0.0001\times(4\times 10^1^2)]meters\\ \\ =[10^-^4\times(4\times 10^1^2)]meters\\ \\ =(4\times 10^8) meters


6 0
3 years ago
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Rus_ich [418]

i^2 = -1

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(5(-1) - 3) * (6i*2^6) =

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5 0
3 years ago
Probably simple math. 20 points.
Harlamova29_29 [7]

ok well first you would find what the square root would be then you just see where it falls on the number line

so the sqrt of 29 is 5.38516... so it falls between 5 and 6.

so the answer is 5 and 6

6 0
3 years ago
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MARKING BRAINIEST!!! 20 PTS!!!
Leno4ka [110]

<u>Missing step in this proof</u> :-

Step 3 :-

→ (Option B)

Statement - DE is parallel to AC

Reason - AB is a traversal cutting DE and AC.

6 0
4 years ago
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Police can estimate the speed of a vehicle before the brakes are applied using the formula 0.75d=(s^2)/(30.25) where s is the sp
Kobotan [32]
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6 0
3 years ago
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