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2 years ago

PLEASE HELP ASAP!!!!!!!!

Mathematics

1 answer:

Alex2 years ago

3 0

Answer:

12.8 is the speed of the boat

Step-by-step explanation:

64/5

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A series of three? separate, adjacent tunnels is constructed through a mountain. Its length is approximately 25 kilometers. Each

Nadya [2.5K]

Answer:

$312.5\pi \text{ km}^3\approx 981.75\text{ km}^3$

Step-by-step explanation:

We have been given that a series of 3 separate, adjacent tunnels is constructed through a mountain. Its length is approximately 25 kilometers.

Each of the three tunnels is shaped like a half-cylinder with a radius of 5 meters.

Since we know that volume of a semicircular or a half cylinder is half the volume of a circular cylinder.

$\text{Volume of a semicircular cylinder}=\frac{\pi r^2h}{2}$ , where,

r = Radius of cylinder,

h = height of the cylinder.

Upon substituting our given values in volume formula we will get,

$\text{Volume of a semicircular cylinder}=\frac{\pi (5\text{ km})^2*25\text{ km}}{2}$

$\text{Volume of a semicircular cylinder}=\frac{\pi*25\text{ km}^2*25\text{ km}}{2}$

$\text{Volume of a semicircular cylinder}=\frac{\pi*625\text{ km}^3}{2}$

$\text{Volume of a semicircular cylinder}=\pi*312.5\text{ km}^3$

$\text{Volume of a semicircular cylinder}=981.74770\text{ km}^3$

Therefore, the volume of earth removed to build the three tunnels is $312.5\pi \text{ km}^3\approx 981.75\text{ km}^3$ .

4 0

2 years ago

Simplify each expression<br> (e^2) (g) (g^4) (e^3)<br> (e)( e^2) (e)

poizon [28]

Answer:

(e^2) (g) (g^4) (e^3)=e^b

(e)( e^2) (e)=ve^4

Step-by-step explanation:

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2 years ago

I need help on numbers 17&18.

jekas [21]

I don't know if this is just my phone, but the picture won't load.

You could try posting a new picture? Or feel free to message me with the picture and I'll be glad to help! :)

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2 years ago

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PLEASE HELP NEED ASAP WILL MARK THE BRAINLIEST

harkovskaia [24]

Answer:

idk

Step-by-step explanation:

idk

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3 years ago

Solve for k. k/8 = 64<br> (explain please)

Veronika [31]

The answer is k=64×8
k=512

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3 years ago

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