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3 years ago

Please help me with this problem.

Mathematics

1 answer:

Tpy6a [65]3 years ago

5 0

Answer:

5.6 meters

Step-by-step explanation:

V = pi r^2 h

We want to solve for h

Divide each side by pi r^2

V/ pi r^2 = pi r^2 h/ pi r^2

V/ pi r^2 =h

We know v = 440 pi = 22/7 and r = 5

440 / ( 22/7 * 5^2) = h

440 / (22*25/7) = h

440*7/550 = h

5.6 = h

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Please help, I really desperate

Paladinen [302]

Answer:

V candle ≈ 196.9 cm³

Step-by-step explanation:

Volume of cone = ( π·r²·h)/3

V candle = V big cone -V small cone

V candle = [ π·4²·(8+5) - π·2²·5]/3

V candle = ( π·16·13 - π·4·5)/3

V candle = (π·16·13 - π·4·5)/3

V candle = π·(208 - 20)/3

V candle = π·188/3

V candle = 196.8731396

V candle ≈ 196.9 cm³

8 0

3 years ago

What is the volume of a hemisphere with a diameter of 51.8 inches rounded to the nearest 10th of a cubic inch?

lorasvet [3.4K]

Answer:

volume of a hemisphere ≈ 36369.5 in³

Step-by-step explanation:

To find the formula for calculating the volume of a hemisphere, we will follow the steps below:

write the formula for calculating the volume of a hemisphere.

volume of a hemisphere = volume of a sphere ÷2

= $\frac{4}{3}$ πr³ ÷ 2

= $\frac{2}{3}$ πr³

where r is the radius

from the question given, diameter = 51.8 inches

but diameter = 2r , this implies that r = $\frac{d}{2}$ hence r = $\frac{51.8}{2}$ = 25.9 inches

π is a constant and is ≈ 3.14

we can now proceed to insert the values into the formula

volume of a hemisphere = $\frac{2}{3}$ πr³

= $\frac{2}{3}$ × 3.14 ×25.9³

= $\frac{2}{3}$ × 3.14×17373.979

≈36369.5 in³ to the nearest tenth cubic inch.

volume of a hemisphere ≈ 36369.5 in³

3 0

4 years ago

The perimeter of a rectangular field is 360yd. The length is 20yd longer than the width. Find the dimensions

Tju [1.3M]

If P=360, then 360yd / 4 sides = 90yds each side. Now that it is a rectangle, the Length should be more than the width, so if the length is 20yds more than the width, do 90 - 20 two times, Width= [ (90yds - 20yds)*2 ]

To sum things up, Length = 110; Width = 70. | 110*2 = 220, 70 * 2 = 140, 220+140 = 360.

5 0

3 years ago

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if You flip an coin 200 times about how many times would you expect the coin to labd on tails what is the probality

harkovskaia [24]

Answer:

50% or 1/2

Step-by-step explanation:

The chance of a coin landing on tails is always 50/50

6 0

4 years ago

What is the approximate area of the circle, in square centimeters? Use 3.14 for pi.

hammer [34]

Answer:

314.16

Step-by-step explanation:

A= πr²

d= r²

20 × π = 314.16

6 0

3 years ago

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