dv/dt = dv/dr*dr/dt. dv/dt is given 0.2, and dv/dr is what you calculated 4pi*r^2 so dr/dt = dv/dt divided by dv/dr. That means 0.2/(4pi*100). Does it make sense ?

Eshi I will look into that

Aww thank you so much; I am happy to help.

kzbin.info/aero/PLCqaz5YaSxqLbkp6S1d6PrEB_nKLKEQj6&si=MByWT69MTrHJHzLF

Eshi I will look into that

Thank you for your support and for sticking with me through your education journey!

thank you

where do I get that? is that like mid exam? sorry I am just teaching from my old time school memory and I do not have current school system details in Ethiopia

Amen; you too. Thank you for your support

a is 2, b -13, c = -20; that means b^2 - 4ac = 13^2 - (4*2*-20) = 169 - (-160) = 329? did you see that ? Do not forget the formula minus and the 'c' negative becomes positive. Let me know if that makes sense?

Yes mr.s i got it now thank you so much❤​@@MathMadeEasyBetty

good job! now you will never forget that negative 'c'. I love it when students do calculations by their own hand. that is the only way to learn or else just watching video is not gonna help. I appreciate you. I am thinking of making you my video editor to catch errors before I upload it to public .... think about it :)

Yes ofc i can be ur video editor its my pleasure❤​@@MathMadeEasyBetty

Thanks; did you have a question from exercise 2.14 part 2; I thought I saw a notification but then when I tried to open it the comment is gone. Just wanted to see if it was from you

Thank you very much; I am happy to help!

Thank you so much! Glad it was clear

Thank you so much

You are very welcome; thank you for your support.

Eshi I am reading about it to refresh my memory and make videos. Thank you for the reminder. When I make videos its not coz I know it, but I study the book and try to refresh my memory from what I have learned years years ago... thank you for your patience

That is absolutely correct! I forgot to complete the work and stoped after finding slope as 1/2. I just added a correction note in the description section and in the video. I pinned your comment on top so that other students can see it. I appreciate you working with me. Thanks again.

@@MathMadeEasyBetty berchilen bexam eyexeqemen nw

I am happy to help. Thank you.

Thank you, I am glad you liked it.

Aww that’s good am glad you are loving Math; I will upload as soon as I can am working on 2.18/19

Thank you so much for paying attention to my work. I just added a correction note in the description section and also pinned your comment on top so that other students can see it. Thanks again I appreciate it. I like how specific u were saving me some time by going straight to 8:11 time stamp

Thank u for your correction may god bless you❤​@@MathMadeEasyBetty

Thank you for the info; Did I make a mistake or you found easy way to do it? if you find easy way to do it that good. I will look into which question you are asking.

You are very welcome; thank you for your support

Thank you, I am glad you liked it

I am glad we found each other now; keep watching my videos I covered a lot of topics and will do more.... welcome to my channel

Get me A (100/100) 😊

What is the book you are using ? PDF if you can share with me I can go over it and see what the topics are to refresh my memory

NO I am making the videos for free but I used to tutor (paid one to one). The title says exercise but I explain the topic before I do exercise. I hope you saw part one of the exercise and also this video for beginners kzbin.info/www/bejne/oaTbnZuvfJiioJI

Thank you for answering the question many students are afraid to answer… ok now let me explain to you. Option C says if critical number then its derivative is zero. But this is not always true it can be when the derivative is undefined too. At local min/max the derivative is zero or undefined so it should not always be zero. Therefore C is not the answer. Can you try again? Good job and thanks again for responding

Thank you; I appreciate your support.

Not done yet

@MathMadeEasyBetty pls do it in this week 🙏 🙏

Will do my best; thank you for your patience

@@MathMadeEasyBetty you're welcome I'm looking forward to it

Thank you very much; yes that is my goal.... Amen you too

Eshi almost getting there

Awe thank you; Amen you too

Always welcome

will do;

ere teacher unit 3 kegeban koyen ena eyegeban ayedelem please tolo belesh serilen

thank you; glad you like it

You are very welcome