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3 years ago

PLEASE HELP !! ILL GIVE BRAINLIEST !! 100 POINTS

Mathematics

2 answers:

muminat3 years ago

8 0

Answer:

6280 mm squared

Step-by-step explanation:

To find the area Of a cylender we multiply pi times r squared times the height, and we can put pi as 3.14

the radius is 10 mm, and the height is 20 mm.

pug it in.

3.14 times 10 squared times 20.

3.14 time 100 time 20

314 times 20

6280 mm squared

Hatshy [7]3 years ago

8 0

Answer: 6300

Step-by-step explanation:

Volume of cylinder=V=πr^2h

As given:

Radius=r=10mm

Height=h=20mm

Substituting values in above formula

V=(3.14)(10)^2(20)

V=6283.18531

After Round off 6300

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The diagram shows a square ABCD with sides of length 20cm. it also shows a semi circle and an arc circle AB is the diameter of t

Brut [27]

Answer:

Area of Shaded Region $=50\pi$ cm^2$

Area of Semicircle $=50\pi$ cm^2$

$\dfrac{\text{Area of Shaded region}}{\text{Area of Square}}=\dfrac{ \pi}{8}$

Step-by-step explanation:

Area of Shaded Region = Area of Sector - Area of Semicircle

Area of Sector

Radius of the sector =20cm

$=\frac{90}{360}X\pi *20^2\\ =100\pi cm^2$

Area of Semicircle

Since AB is the diameter of the semicircle

Radius of the Semicircle=20/2=10cm

Area of semicircle

$=\frac{\pi r^2}{2}\\ =\frac{\pi *10^2}{2}\\=50\pi cm^2$

Therefore, area of Shaded Region

$=100\pi -50 \pi\\=50\pi$ cm^2$

Area of Square =20 X 20 $=400 cm^2$

$\dfrac{\text{Area of Shaded region}}{\text{Area of Square}} \\=\dfrac{50 \pi}{400} \\=\dfrac{ \pi}{8}$

4 0

3 years ago

If c=12, find r in the equation c=2πr. Round your answer to the nearest hundredth

lesya [120]

If c=12, then c=2*pi*r has to equal 12 as well
Simply set 2*pi*r=12 and solve for R
pi*r=6
r= approximately 1.91

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3 years ago

I need help :(( .............................

zepelin [54]

Answer:

Step-by-step explanation:

hope this helps

7 0

3 years ago

Chloe rode her bicycle directly from her house to the library in 4 minutes. The library is 1 mile from her house.

kramer

Speed = distance / time
speed = 1(mile) / 4 (minutes)
speed = 0.25 miles per minute
s = 0.25m <== ur equation

there are 60 minutes in an hr....so sub in 60 for m
s = 0.25(60)
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5 0

3 years ago

Read 2 more answers

Round up 1.795 to 2 decimal places

vfiekz [6]

Answer:

1.80

Step-by-step explanation:

Since we're rounding up to 2 decimal places we won't put the 5 in 1.795 in consideration, we'll just round up 79 which will give us 80, so we'll have 1.80. We're not rounding up to the nearest whole number or to one decimal place so the answer will remain as 1.80

7 0

3 years ago