3 years ago

Which statement best describes a physical change?

2 answers:

7 0

The third one is the answer

changes can occur to chemical properties of a substance but the chemical composition of the substance remains the same

SOVA2 [1]3 years ago

3 0

I think either c or d

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Is anyone good at doing essays if you are can u be my essay writer u must have social. Media or disc

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3 years ago

In triangle ABC, the right angle is at vertex C, a = 714 cm and the measure of angle A is 78° . To the nearest cm, what is the l

Contact [7]

Answer:

c = 730 cm

Step-by-step explanation:

To solve this question we just need to use the law of sines:

The ratio between a side in the triangle and its opposite angle is always the same.

So we have that:

$a / sin(A) = c / sin(C)$

$714 / sin(78) = c / sin(90)$

sin(78) is equal 0.9781 and sin(90) is equal 1, so we have:

$714 / 0.9781 = c / 1$

$c = 714 / 0.9781 = 730\ cm$

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3 years ago

How to get a square root of a given number

bonufazy [111]

Answer:

See below

Step-by-step explanation:

The square root of a number is defined as $\pm y=\sqrt[2]{x}$ where $(\pm y)^{2}$ gives the original number. For example, $\sqrt{4}=\pm2$ because $2^{2}=2*2=4$ and $(-2)^{2}=-2*-2=4$ .

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3 years ago

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What are significant numbers? please explain?

My name is Ann [436]

Non zero digits are always significant. any zeros between two significant digits are significant. a final zero or trailing zero in the decimal portion only are significant.

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3 years ago

For the pair of points, find the slope of the line that passes through both points.

ser-zykov [4K]

5-1/7-1
4/6
Answer 2/3

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