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Svetlanka [38]
4 years ago
7

From the top of a tree 20 metres high,the angle of depression at a point on the opposite bank of a river is found to be 30° .Fin

d the breadth of the river.
Mathematics
1 answer:
svet-max [94.6K]4 years ago
3 0

Answer:

17.3

Step-by-step explanation:

sin(30)=0.5

0.5*20=100

20*20+x*x=100

x=17.3

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spayn [35]

Answer:

Option B is the correct choice.

Step-by-step explanation:

The graph is attached below.

We have to find the x intercept meaning the value of the point onx-axis when y=0

So we will put the value of zero (0) instead of y in our given equation.

So here we have solved it algebraically.

y=\frac{3}{4}x-3

Putting y=0

0=\frac{3}{4}x-3

0=\frac{3x-12}{4}

Multiplying 4 both sides.

0=3x-12

Adding 12both sides.

12=3x

Dividing with 3 both sides.

x=\frac{12}{3}=4

So the x-intercept of the given equation is 4 which can be written as (4,0) in terms of coordinates.

Option B (4,0) is the correct choice.

8 0
3 years ago
PLZ HELP!
Tanya [424]

Answer:

B. 60cm^3

Step-by-step explanation:

The volume of a right triangular prism is

V = BH  where B is the area of the triangle and H is height

B = 1/2 bh  where b =5 and h =8

B = 1/2 *40 = 20

V = (20) * 3

V = 60 cm^3

We need to be careful to do the area of the triangle first

8 0
4 years ago
What does <br> $8 -$6 +$8 -$3<br> Equal?
jeka94

Answer:

$8-$6+$8-$3=$7

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7 0
3 years ago
astronomers estimate that there are about 10 to the power of 11 galaxics in the universe and that each galexy contains about 10
nika2105 [10]

Answer:

10^22

Step-by-step explanation:

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3 0
2 years ago
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Step-by-step explanation:

I added together his estimations and then subtracted the total from how much money was in his bank.

2,477+2,263+3,218=7,958

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I really hope this helps

4 0
3 years ago
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