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3 years ago

6

from the top of a cliff 20m high,a boat can be sighted at sea 75m from the foot of the cliff.calculate the angle of depression o

f the boat from the top of the cliff

1 answer:

r-ruslan [8.4K]3 years ago

3 0

Answer:

The angle of depression will be= 14.9 degrees

Step-by-step explanation:

tanx=20/75=0.267

x=tan−10.267=14.93°

x= 14.9°

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Plz help its hard for me

oksian1 [2.3K]

3. Any number you choose between 7 and 3
4. Any number you choose below 8

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3 years ago

In Lucille’s class, 35% of the students have blond hair. There are 20 students in the class. How many students have blond hair.

MrRissso [65]

Answer:

7 the answer is 7

Step-by-step explanation:

1. We assume, that the number 20 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 20 is 100%, so we can write it down as 20=100%.

4. We know, that x is 35% of the output value, so we can write it down as x=35%.

5. Now we have two simple equations:

1) 20=100%

2) x=35%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

20/x=100%/35%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 35% of 20

20/x=100/35

(20/x)*x=(100/35)*x -

20=2.85714285714*x -

20/2.85714285714=x

7=x

x=7

now we have:

35% of 20=7

we multiply both sides by x

then we divide both sides by 2.85714285714 to get x

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3 years ago

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What does 6/2(1+2) equal to

Aliun [14]

Rewrite this as fractions: $( \frac{6}{2} )( \frac{1+3}{1} =(3)(3)=9$

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3 years ago

The human resource department at a certain company wants to conduct a survey regarding worker benefits. The department has an al

Mama L [17]

Answer:

Explained below.

Step-by-step explanation:

The human resource department at a certain company wants to conduct a survey regarding worker morale. The department has an alphabetical list of all 4,502 employees at the company and wants to conduct a systematic sample of size 50.

Systematic sampling is a kind of probability sampling method in which individuals from a larger population are nominated according to a random initial point and a static, periodic interval.

(a)

A sample of size 50.

Then the value of <em>k</em> will be: $k=\frac{4502}{50}=90.04\approx 50$

Thus, the value of <em>k</em> is 90.

(b)

Label the employees from 1 to 4502.

And select every 90th employee.

So, the individuals who will be administered the survey are:

90th, 180th, 270th,...

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3 years ago

W+w+w+w+w+15-7 I got this wrong on a math question. I did 5w+8 = 13w

Aleonysh [2.5K]

$w+w+w+w+w+15-7=\underbrace{w+w+w+w+w}_5+(15-7)\\\\=5w+8-\text{finish}\\\\\text{You can not add 5w and 8. These are different monomials.}$

Example:

5w - five apples

8 - eight strawberries

5w + 8 = (five apples) + (eight strawberries) = 13 of what?

You can add only numbers of the same fruits.

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3 years ago

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