3 years ago

I need help ._. Can u plz help me?

Mathematics

1 answer:

wlad13 [49]3 years ago

8 0

Answer:

Step-by-step explanation:

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An observer at the top of a tower of height 20m sees a man due East of him at an angle of depression of 27°. He sees another man

kotegsom [21]

Answer:

52.35 m

Step-by-step explanation:

Refer to picture.

Let the distance to men are x and y and the distance between them is d.

The angle of depreciation is 27° and 30°, hence top angle of the triangle is 63° or 60°.

Find the distance from the tower to men:

x = 20 tan 63° = 39.25 m
y = 20 tan 60° = 34.64 m

The distance between men is:

d = $\sqrt{x^2+y^2} =\sqrt{39.25^2+34.64^2} = 52.35m$

Note, all numbers are rounded

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2 years ago

Make m the subject of the formula r=5m²-n

KATRIN_1 [288]

Answer:

√(r+n)/5=m

Step-by-step explanation:

r=5m²-n

adding n on both sides

r+n=5m²-n+n

r+n/5=m²

taking square root on both sides

√(r+n)/5=m

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3 years ago

For the ratio 28 : 36, find an equivalent with both terms greater tan 6 less than 10

velikii [3]

28:36
Divide both by 4 to get
7:9

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3 years ago

1. Find the diameter of a circle whose circumference is 18.85 m. A. 3.46 m B. 12 m C. 6 m D. 2.45 m

Korolek [52]

For this case we have to:

The circumference or perimeter of a circle is given by:

$c = \pi d\\$

where d is the diameter of the circle.

Substituting the given value of c, $c = 18.85m$ , we have:

$18.85 = \pi d\\$

$d = \frac{18.85}{\pi } \\\\d = 6\\$

Therefore, the diameter of the circle is 6m.

Answer:

Option C

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3 years ago

Read 2 more answers

Hazhair bought 2 DVDs for $12.95 each. He spent $25 on magazines. Did he spend more on DVDs or magazines? How much more? Write e

marshall27 [118]

Answer

5.9

12.95*2=25.9

25.9-20

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3 years ago