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Natasha_Volkova [10]
3 years ago
7

A cylindrical well is 20 meters deep and has a diameter of 1.5 meters. Approximately how many cubic meters of soil were dug out

to make the well? (Use π = 3.14.)
11.78 cubic meters
35.33 cubic meters
121.20 cubic meters
141.30 cubic meters
Mathematics
2 answers:
Helen [10]3 years ago
6 0
V=\pi  r^{2} h 
V= \pi .75(20)=35.33
Lynna [10]3 years ago
3 0
Okay you know the drill use the volume formula for a cylinder then plug in the numbers
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zvonat [6]

Part i


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y = \dfrac{ 2c(2a-7)}{6(3b-5)} = \dfrac{c(2a-7)}{9b-15}


Substituting,

y = \dfrac{4(2(2)-7)}{9(3)-15} = \dfrac{ -12}{12} = -1


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Part ii


I'm not sure that one's typed in correctly but I'll solve it as written.


3-34y + 2a = \dfrac{3b-5}{2c + 1}


34y  = 3+2a-\dfrac{3b-5}{2c + 1}


y = \frac 1 {34}\left(3+2a-\dfrac{3b-5}{2c + 1} \right)


We're not asked to simplify it so I wont. Substituting,


y = \frac 1 {34}\left(3+2(2)-\dfrac{3(3)-5}{2(4) + 1} \right) = \frac 1 {34}(7-4/9) = \dfrac{59}{306}


Answer: 59/306



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It's 3.01 sorry wrong question please forgive me
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PLEASE HELP MEE
wel

Hey!

Sorry this answer is too late to help you but hopefully it will help future users...

an= 1/4 * an-1

a1= -64

What is in bold is what you type into the answer box.

I also have a pic attached.

I hope this helps you! Good luck on the test!

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