Question

Medal+Fan

Answer 1

1.c
2.b
3.d
4.a

Answer 2

@Ryuga

Answer 3

Cam: You've posted several problems here. Which one do you want to solve NOW?

Answer 4

the very last one

Answer 5

this one

Answer 6

OK.

Please type in the formula for the AREA of a circule whose radius is r.

Answer 7

a=π times R^2

Answer 8

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 \[A=\pi r^2\]

Answer 9

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?

Answer 10

314 2/7 cm^2

Answer 11

Right. Now, look again at \[A=\pi r^2\]

Answer 12

Replace A with 314 2/7 cm^2.

Answer 13

314 2/7=22/7 times r^2

Answer 14

Write out the whole equation, please.

Why "times?"

Answer 15

because there is no multiplication button

Answer 16

Use * to denote multiplication.

Answer 17

\[A=\pi r^2\]

Answer 18

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?

Answer 19

with have the value for A and π because my teacher keeps telling me that pie equals 22/7

Answer 20

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 \[A=\pi r^2\]

Answer 21

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?

Answer 22

A and the value is 314 2/7

Answer 23

Yes. that is approximately equal to 314.28.

Answer 24

I'd like for you to write the GENERAL formula for the area of a circle, below:

Answer 25

No numbers!

Answer 26

A=πr squared

Answer 27

i had to put the word squared because i can't put numbers

Answer 28

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.

Answer 29

314 2/7=πr squared

Answer 30

Right. Now, Cam, your job is to solve that equation for the radius, r. How would you do that?

Answer 31

you have to insert what pi is

Answer 32

then solve

Answer 33

You have 314 2/7 = pi * r ^2

Answer 34

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,

Answer 35

Hint: Divide both sides of the equation by pi.