Question

File attached, sort of long question.

Answer 1

@31356

Answer 2

Sorry, I haven't learned about this yet. o.0
Sorry........

Answer 3

its fine thanks for the help :)

Answer 4

@hoblos

Answer 5

Anytime :D

Answer 6

@zepdrix

Answer 7

Well, look at the first one. It asks if the numerical values of area and circumference are equal if r = 2, then gives a list of formulas:

\[A = \pi r^2 \qquad C = 2\pi r\]\[A = \pi\cdot r\cdot r\qquad C = \pi\cdot r\cdot 2\]\[A = (\pi\cdot r)\cdot r \qquad C = (\pi\cdot r)\cdot 2\]

Can you find the various values of A and C?

Answer 8

Well A is area and C is circumference

Answer 9

no need to break out the calculator, just leave \(\pi\) as \(\pi\), so the very first one would be \(A = \pi (2)^2 = \pi*4 = 4\pi\)

Answer 10

So it would be the first one?

Answer 11

Go through and evaluate all of those equations under the conditions given. r = 2

what do you get?

Answer 12

The second and fourth one.

Answer 13

what is the value of A in each of those equations? What is the value of C in each of those equations?

Answer 14

Oh, well if r=2 then for A it would be 2 times 2 times 3.14 and then for C it would be 4 times 3.14
Which gives 12.56 for each one
so it would be the first one only

Answer 15

I guess you didn't understand my request to leave \(\pi\) as \(\pi\) rather than making a number...

so \( A = 4\pi\) and \(C = 4\pi\) for all of those forms when \(r = 2\), yes?

Answer 16

Yes

Answer 17

Good. Moving along in methodical fashion, the next statement is "The numerical value of the area is less than the numerical value of the circumference when r < 2"

Pick a value of \(r < 2\). How about 1? Now find the values of A and C.

Answer 18

I hope you're in agreement that all of the formulas for A are equivalent, and all of the formulas for C are equivalent as well.

Answer 19

Oh I get it, I'll do it on a sheet of paper since I gotta get off the computer, thanks for the help :)

Answer 20

just work through each statement, finding the values, and deciding if that statement is true or false. Check all the true ones, and you're done.