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MrMuchimi
3 years ago
13

A person in an helicopter flying at a height of 700 meters, observes two objects lying opposite to each other on either side of

the bank of a river. The angles of depression of the objects are 35° and 50°. Find the width of the river to the nearest foot.
A. 412 ft
B 1000 ft
C 1342 ft
D 1587 ft
Mathematics
1 answer:
weqwewe [10]3 years ago
6 0

Answer:

Let C be the position of a person in a helicopter. A,B be two objects lying opposite to each other on either bank of a river.

Let AD=x,BD=y

In ΔACD,

⇒tan30

o

=

AD

CD

​

⇒

3

​

1

​

=

x

700

​

⇒x=130

3

​

⇒x=130(1.732)=1212.4

∴ the width of the river =x+y

=1212.4+130

=1342.4m

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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5 0
3 years ago
Write an algebraic expression for: The sum of ten and a number.
meriva

Hi,

The sum of ten and a number.

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So if the question uses AND, it's adding.

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4 0
3 years ago
Fifty-five percent of the members of the junior varsity swim team wear glasses. Of the team memebers who do not wear glasses, 30
GarryVolchara [31]

the probability that a randomly chosen member of the JV swim team does not wear glasses and is in the 10th grade is 14%.

Given, the members of the junior varsity swim team wear glasses is 55%.

And the members of junior varsity swim team who do not wear glasses and in 10th grade is 30%.

Let the total no. of members be x.

So, the members of the junior varsity swim team wear glasses (55%),will be

0.55x.

The total number of members not wearing glasses, will be

x - 0.55 x = 0.45 x.

Now, the no. of members not wearing glasses and in 10th grade will be,

\frac{0.45x\times30}{100} =0.135x

We know that the probability of an event E, P(E) will be,

P(E)=\frac{No.\ of Favourable\ outcomes}{total \ no. \ of \ outcomes}

So, the probability for no. of members not wearing glasses and in 10th grade will be,

P(E)=\dfrac{0.135x}{x}

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Hence the nearest whole percent of probability is 14%.

For more details on probability follow the link:

brainly.com/question/795909

8 0
2 years ago
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hichkok12 [17]

Answer:

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Step-by-step explanation:

5 0
3 years ago
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Enter the equation of the line in slope-intercept form.
QveST [7]

Answer:

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Step-by-step explanation:

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14 = b

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4 0
3 years ago
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