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prohojiy [21]
3 years ago
13

I) Find the volume in terms of pie

Mathematics
1 answer:
SVETLANKA909090 [29]3 years ago
3 0

Answer:

i) pi×4500 cm³

ii) pi×600 cm²

iii) 14 liters

Step-by-step explanation:

in general : the diameter is 30 cm, the radius is half of that (15 cm)

i)

the volume of a cylinder is base area times height.

Vc = pi×r²×h = pi×15²×20 = pi×225×20 = pi×4500 cm³

ii)

similar to volume, the side "mantle" area of the cylinder is the circumference of the base area times height.

surface area of the cylinder mantle is

Scm = 2×pi×r×h = 2×pi×15×20 = pi×30×20 = pi×600 cm²

iii)

for this we need now to do the multiplication with pi and then convert the cm³ to liters.

1 liter = a cube of 10 cm side length = 10×10×10 = 1000 cm³

pi×4500 = 14137.17 cm³ = 14.13717 liters or rounded 14 liters

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Hello from MrBillDoesMath!

Answer:

x < -2

Discussion:

7 < 3 - 2x                       => Add 2x to both sides

7 + 2x < 3 - (2x - 2x)     =>  As 2x -2x = 0

7 + 2x < 3                      =>  Subtract  7 from both sides

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7 0
3 years ago
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olya-2409 [2.1K]

Answer:

-10

Step-by-step explanation:

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-x+5^2+25

-5 -5

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3 0
3 years ago
Solve for p.
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Answer:

p = -2

Step-by-step explanation:

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first get rid of the bracquetes:

5p - 10 = + 4*1 + 4*3p

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subtract left and right of = sign by 4

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divide left and right of = sign by 7

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