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3 years ago

What is the exact length of AB? (photo below)

Mathematics

2 answers:

yawa3891 [41]3 years ago

5 0

I don't know an equation so don't do rate this...but if it were me, I would guess between 6(pi) or 8(pi)

olga_2 [115]3 years ago

3 0

As you can see, the central angle for the arcAB is 270°, whilst the radius is 4 units long.

$\bf \textit{arc's length}\\\\
s=\cfrac{\theta \pi r}{180}~~
\begin{cases}
r=radius\\
\theta =angle~in\\
\qquad degrees\\
------\\
\theta =270\\
r=4
\end{cases}\implies s=\cfrac{(270)(\pi )(4)}{180}\implies s=6\pi$

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A planet has a circular orbit around a star. It is a distance of 65,000,000 km from the centre of the star. It orbits at an aver

guapka [62]

Answer:

Step-by-step explanation:

Orbit = 2*pi * r

r = 65000000 km

Orbit = 65000000 * 2 * 3.14

Orbit = 406 200 000 km

d = 406 200 000

s = speed = 65000 km / hr

t = time = d / s

t = 406,000,000 / 65000

t = 6280 hours.

1 day = 24 hours.

t = 6280 / 24 = 261.67 days

8 0

3 years ago

What is the diameter of a circular field whose area is 616cm^2<br><br>

Oksana_A [137]

Answer:

Step-by-step explanation:

$d=2\sqrt{\frac{A}{\pi}} =2\sqrt{\frac{616}{\pi} }$ ≈ $28.00563cm$

rounding 28.00563 to 28.

So hence, your answer is 28cm

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3 0

2 years ago

Read 2 more answers

-32 +(-18) =<br> Show step by step to answer

Nuetrik [128]

Answer:

-50

Step-by-step explanation:

-32 + ( -18 )

= - 32 - 18

= -50

Hope this helps!

8 0

3 years ago

Read 2 more answers

8x-11+5x+2x+6=180 what is the measurement for x.

Verizon [17]

I assume you're looking for the value of x?

Combine like terms: 8x+5x+2x-11+6=180 -> 15x-5=180

Add 5 to both sides: 15x=185

Divide both sides by 15: x=12 1/3

So x is 12 1/3 or 37/3

Hope this helped!

6 0

3 years ago

Find the values of x and y

icang [17]

Answer:

$x=15\\y=38$

Step-by-step explanation:

By definition, the sum of the interior angles of a triangle is 180 degrees.

You can observe that the given triangle has an angle that measures 90 degrees and it also has two equal sides.This means that the other two angles are equal.

Knowing this, you can conclude that the triangle is an Isosceles Right Triangle and the other angles measure 45 degrees each.

Therefore, now you know that:

$3x=45$