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2 years ago

Express the number in scientific notation. 63,600,000

Mathematics

2 answers:

sasho [114]2 years ago

7 0

Answer:

A) 6.36×10^7

Step-by-step explanation:

Crazy boy [7]2 years ago

5 0

Answer: a. 6.36×10<span>^7
the first thing you have to know is that scientific notation is shown as the product of a number n (1</span>≤<span>n<10) and ten to the x th power. So c and d are wrong.
then count. so you will see a is right</span>

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Answer:

2√5

Step-by-step explanation:

Distance = √(x1-x2)² + (y1-y2)²

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3 months ago

Can someone help me find the equation for this line please

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Answer:

y = x + 1

Step-by-step explanation:

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2 years ago

Distribute 1/3(12y - 9)

allochka39001 [22]

3. 4y-3
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2 years ago

1)a chord of length 18cm midway the radius of a circle. calculate the radius of the circle correct to 1d.p. 2)if two parallel ch

kykrilka [37]

Part 1:

Given that the length of the chord is 18 cm and the chord is midway the radius of the circle.

Thus, half the angle formed by the chord at the centre of the circle is given by:

$\cos\theta=\frac{\left( \frac{1}{2} r\right)}{r}= \frac{1}{2} \\ \\ \Rightarrow\theta=\cos^{-1}\left( \frac{1}{2} \right)=60^o$

Now,

$\sin60^o= \frac{9}{r} \\ \\ \Rightarrow r= \frac{9}{\sin60^o} =10.392$

Therefore, the radius of the circle is 10.4 cm to 1 d.p.

Part 2I:

Given that the radius of the circle is 10 cm and the length of chord AB is 8 cm. Thus, half the length of the chord is 4cm. Let the distance of the mid-point O to /AB/ be x and half the angle formed by the chord at the centre of the circle be θ, then

$\sin\theta= \frac{4}{10} = \frac{2}{5} \\ \\ \theta=\sin^{-1}\left( \frac{2}{5} \right)=23.6^o$

Now,

$\cos23.6^o= \frac{x}{10} \\ \\ \Rightarrow x=10\cos23.6^o=9.165\approx9.2cm$

Part 2II:

Given that the radius of the circle is 10cm and the angle distended is 80 degrees. Let half the length of chord CD be y, then:

$\sin40^o= \frac{y}{10} \\ \\ \\ \Rightarrow y=10\sin40^o=6.428$

Thus, the length of chord CD = 2(6.428) = 12.856 which is approximately 12.9 cm.

3 0

2 years ago