Answer: The length of BC ≈ 12.4 cm
Step-by-step explanation:
The first thing we need to do is to find the length of BD which we can solve for with the tangent of 20° which is the opposite side over the adjacent side.
We get tan20° = BD/8.
Solve for BD and you get BD = 8tan20°.
Now we will need to solve for the length of CD which we can get from the tangent of 40°.
We get tan40° = 8/CD
Solve for CD and you get CD = 8/tan40°.
Now that we have the lengths of BD and DC, we can simply add them together to get the length of BC.
(8tan20°) + (8/tan40°) ≈ 12.4 cm
In order to estimate this problem we must first estimate the two numbers involved.
137,638 rounds up to 138,000.
Since the 6 is bigger than 5 it makes the number 7 round up to 8
Now..
52,091 rounds out to 52,000
Since the number to the left of the 2 is not bigger than 5 then it stays the same at 52,000
Now we have to add our estimated numbers.
138,000 + 52,000 = 190,000
Your answer is 190,000
Good Luck! :)
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Answer:
5,555,675,644,463,319
Step-by-step explanation:
plz mark brainly
JK 78 LOL
Answer:
1000
Step-by-step explanation:
5/0.0005=1000
Answer:
Sin A = 0.38462
Step-by-step explanation:
From the trigonometric function,
Sin A = 
................... 1
So that, applying the Pythagoras theorem to determine the value of hypotenuse,
= 
+ 
= 
+ 
= 576 + 100
= 676
Hyp = 
= 26
The hypotenuse of the triangle is 26.
Thus, from equation 1;
Sin A = 
Sin A = 0.38462
