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1.c 2.b 3.d 4.a
Cam: You've posted several problems here. Which one do you want to solve NOW?
the very last one
OK. Please type in the formula for the AREA of a circule whose radius is r.
a=π times R^2
By that I meant "the general formula." Yes, you're right. If A is the area of the circle, and r is the radius, then the relationship between A and r is given by \[A=\pi r^2\]
OKI. Now go back to the statement of the problem you've most recently posted. Does that statement give you the area of the given circle? if so, what is it?
314 2/7 cm^2
Right. Now, look again at \[A=\pi r^2\]
Replace A with 314 2/7 cm^2.
314 2/7=22/7 times r^2
Write out the whole equation, please. Why "times?"
because there is no multiplication button
Use * to denote multiplication.
Let's try this problem solution a different way. The above equation has two variables, A and r. You have the value of one of them. Which one? And what is that value?
with have the value for A and π because my teacher keeps telling me that pie equals 22/7
Cam, you can use 22/7 as an APPROXIMATION pi. But that's not what I asked you. I've given y ou the equation \[A=\pi r^2\]
and told you that there are 2 variables in this equation, A and r. For which one do y ou have a value, and what is that value?
A and the value is 314 2/7
Yes. that is approximately equal to 314.28.
I'd like for you to write the GENERAL formula for the area of a circle, below:
i had to put the word squared because i can't put numbers
All right. That is the correct formula for the area of a circle. NOW, CAM, you are told that the area is 314 2/7. Please type in the same formula, BUT replace A with 314 2/7.
314 2/7=πr squared
Right. Now, Cam, your job is to solve that equation for the radius, r. How would you do that?
you have to insert what pi is
You have 314 2/7 = pi * r ^2
the first step is to isolate (solve for) r^2 (which means "r squared"). Leave pi alone; we will worry about its numerical value later. Solve the above equation for r^2, please. Leave pi as the symbol,
Hint: Divide both sides of the equation by pi.
Cam: haven't heard from you for ten minutes or so. Still interested in solving this problem? I need to see some "signs of life" at your end.
Thanks for your help i will ask my teacher. I will give you a medal and fan
oh i forgot i already fanned u
thank you, Cam, but I'm entirely confident that you and I could solve this problem together. Why do you need to (or prefer to) see your teacher instead?