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Mathematics 18 Online
OpenStudy (liv1234):

NEED HELP WITH A QUESTION PLEASE.

OpenStudy (liv1234):

I think the answer is B.

rvc (rvc):

\(\Large\rm Area~of~circle=\pi~ r^2~~\\~~\\ \Large where~r~is~the~radius~of~the~circle\)

rvc (rvc):

here in this question r =?

OpenStudy (liv1234):

3.14*4.1^2

rvc (rvc):

4.1 is the length or diameter or radius?

OpenStudy (liv1234):

Radius

rvc (rvc):

so \(\pi\) (4.1)^2

OpenStudy (liv1234):

52.7834

rvc (rvc):

what is the square of 4.1 ?

rvc (rvc):

here we need not multiply the value of pi since the answer is in pi

OpenStudy (liv1234):

So, 16.81?

OpenStudy (liv1234):

That's the square of 4.1

rvc (rvc):

correct :) All The best

OpenStudy (liv1234):

Can you help me with another question?

rvc (rvc):

Sure

OpenStudy (liv1234):

rvc (rvc):

i have seen this question in one of the test :)

OpenStudy (liv1234):

I know, I need help with it aha.

OpenStudy (liv1234):

Like, can you go over it with me?

rvc (rvc):

@aryandecoolest please help :)

OpenStudy (butterflydreamer):

well they've given us a scale where 1cm = 10 ft. So if we plant the trees 4.7 cm = ? ft You basically want to change from 4.7cm INTO feet using the fact that 1cm = 10ft. Sooo since, 1cm = 10 ft 4.7cm = 10 * 4.7 ft = ? ft

OpenStudy (liv1234):

47! But would it be ft or cm?

OpenStudy (butterflydreamer):

correct :) Read what i wrote carefully... we are converting cm ----> ft Therefore 4.7 cm -----> 47 ft right? :)

OpenStudy (liv1234):

That makes sense(: Can you help me with a couple of other questions?

rvc (rvc):

good job @butterflydreamer thanks :)

OpenStudy (liv1234):

OpenStudy (butterflydreamer):

i'm trying to write a speech right now so xD Sorrryy! Good luck :) I'm sure rvc can help you with some more?

OpenStudy (liv1234):

@rvc can you help me with that question i just put up?(:

rvc (rvc):

yes cross multiply

OpenStudy (liv1234):

I do know how to cross multiply, but this one confuses me.

OpenStudy (liv1234):

Also, I need help with one more question after this one.

rvc (rvc):

example \[\frac{ x }{ 15 }=\frac{ 5 }{ 2 }-->x=\frac{ 5 }{ 2 } X 15\]

OpenStudy (liv1234):

So, 5/7*56?

OpenStudy (liv1234):

Which would be 40?(:

OpenStudy (liv1234):

So, would it be 40?

OpenStudy (liv1234):

@rvc Can you help me with another question please??(::

rvc (rvc):

okay

OpenStudy (liv1234):

OpenStudy (liv1234):

This is the last one I need help with(:

rvc (rvc):

the polygons are similar so the sides will be in proportion

OpenStudy (liv1234):

So, how do we figure it out?

OpenStudy (liv1234):

Wait wait wait!! So, 18*1.5=27. And 6*1.5=9. So would the answer be 9?

rvc (rvc):

\[\rm \frac{ AD }{ JM }= constant~ ratio\]

rvc (rvc):

you are right

rvc (rvc):

All The Best :)

OpenStudy (liv1234):

Thank you(:

rvc (rvc):

:)

OpenStudy (liv1234):

I gave @butterflydreamer a medal, but I wanted to give you one, but it won't let me, so I'll fan you(:

rvc (rvc):

lol its fine dear

OpenStudy (liv1234):

I have 53 questions on my final, I've already answered like 6 of them so I'm proud of myself. :p

OpenStudy (liv1234):

Can I get your opinion on something?

rvc (rvc):

yep

OpenStudy (liv1234):

I'm going to get my hair done today and I was wondering which one you like best out of these two hairstyles that I wanna get.

OpenStudy (liv1234):

OpenStudy (liv1234):

rvc (rvc):

ah all suits you dear

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