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Murrr4er [49]
3 years ago
11

Find the area of a sector with a central angle of 140° and a diameter of 9.6 cm. Round to the nearest tenth.

Mathematics
1 answer:
olchik [2.2K]3 years ago
8 0

Answer:

A=28.1\ cm^2

Step-by-step explanation:

The area of a circular sector with a central angle θ and radius r is given by:

\displaystyle A=\frac{1}{2}r^2 \theta

<em>Note</em>: The angle must be in radians.

We need to find both the radius and the angle in radians.

Diameter = 9.6 cm

Radius r=Diameter/2=4.8 cm

Angle in radians= Angle in degrees*π / 180

θ = 140*π / 180 = 2.4435 rad

Now we calculate the area:

\displaystyle A=\frac{1}{2}(4.8)^2 2.4435

\boxed{A=28.1\ cm^2}

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Answer:

a is the right answer atleast that's what I think

3 0
3 years ago
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Write an equation to represent function A
maw [93]

Answer:

y = 312x + 2

Step-by-step explanation:

According to y = mx + b, m stands for slope and b stands for y-intercept. Let us find the y-intercept. To find the y-intercept, the x should be zero in (x, y).

(x, y)

(0, 2) ---> y-intercept (b)

Now that we have found the y-intercept, we will now find the slope by using its formula.

Slope formula:-

m = y2 - y1 / x2 - x1

Pick two random (x, y). I will pick the first and last pairs.

(0, 2) and (4, 1250)

Now plug these two pairs in the formula.

m = y2 - y1 / x2 - x1

m = 1250 - 2 / 4 - 0

m = 1248 / 4

m = 312

This means that the slope (m) is 312. Now put that in y = mx + b form.

y = mx + b

y = 312x + 2

Both of the forms are the same. Hope this helps, thank you :) !!

6 0
2 years ago
The aspect ratio of the television screen is 16:9 and it is 63cm High. What is its width?
fiasKO [112]
The answer would be 75 width
6 0
2 years ago
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6 0
3 years ago
Ivanka has a ribbon that is 4.5 inches long. Michal has a ribbon that is 3 1/10 times the length of ivanka’s ribbon. How long is
ddd [48]

Answer:

6.30

Step-by-step explanation:

Ivanka’s ribbon = 4.5 inches long

Michal’s ribbon is 3 1/2 times ivanka’s

Therefore,

Michal’s = 3 1/2 x 4.5

= 7/5 x 4.5

= 31.5/5

= 6.3 = 6.30 to the nearest hundredth

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3 years ago
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