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If you know the circumference.......the radius, r, can be found by :

[Circumference] / [2 x pi]   = r     ( for  pi, you can use   ≈  3.14 )

I sometimes delve into calculus, just wanted to see if my calculations(answear is correct) though my year is doing this right now and i have finished everything, so i decided to try something more harder. I learned calculus a few months back!

Hi Buubleman,

How come you are posting this primary school question AND a difficult calculus question?

That is crazy!     

m= 3 

thank you very much :)

Translations from russian

3B-2 degree 3 degree -9v 3 x 7 = 2 to the power of 675

Is this the question?

Это вопрос?

\(3B-2^3-9^3*7=2^{675}\)

The symbol for power is ^      

    So 2^5=3

And maybe you could add some brackets to help us work out what your question is.

Символ власти ^
Так 2 ^ 5 = 3
И, может быть, вы могли бы добавить некоторые скобки, чтобы помочь нам разобраться, что ваш вопрос.

If this is

2sin2x + sinx = 0

2*2sinxcosx + sinx  = 0     

4sinxconx + sinx  = 0    factor out sinx

sinx ( 4cosx + 1)  = 0

Then either

sin x = 0    and this happpens at 180°

Or

4cosx +  1 = 0

cosx  = -1/4      and this happens at about 104.48°   and at  about 252.52 °

Here's the graph.......https://www.desmos.com/calculator/xr4vh9ar1d

I was thinking that maybe they meant, starting from the right as in the the oldest on the right and on the left decending, because in that case the answear would be ACB!

half the number of pancakes twice so 200ml = 4 pancakes and then again so 100ml = 2 pancakes so you just take 100ml away from 400ml to get the amount for 6! so 400ml-100ml=300ml. 300ml is the answear

It's possible they MEANT to ask that you put them in order of YOUNGEST to OLDEST......BUT they didn't ask that , so there is no answer of your selections that is correct!

If just the 9 repeats,  the answer is

[39 - 3] / 90  =

36/90  =  2/5

If the 39  repeats, the answer is

39/99  = 13/33

The inverse of arctan is tan.    

9/64  x  4   =   (9) (4) /64     Divide top and bottom by 4

=  9 /16   

If T(n) = 3n-1 , what is the 3rd term ?

T(n) = 3n-1

T(3)=3*3 - 1=8, However, it depends on what you want your 1st. term to be.

If you start with: 0, 1, 2, 3, 4....etc., then the terms will be: -1, 2, 5, 8, 11.....etc. And as the result of this, your 3rd term will be:5 instead of 8, and so on.  

y = 3x+2 is the equation of a straight line graph.

What is its gradients?

The gradient and y intercept form of a line is   y=mx+b

m is the gradient and b is the y intercept.

So what number is in the m position?

If T(n) = 3n-1 , what is the 3rd term ?

\(T(3)=3*3-1\\ T(3)=8\)

If 400ml of milk is used for 8 pancakes, how much is used for 6 ?

400/8=50ml used to make 1 pancake

50 X 6=300ml of milk needed to make 6 pancakes.

Well, thanks. i Was kind of pondering anyway!

If 400ml of milk is used for 8 pancakes , how much is used for 6 ?

Sometimes answer sheets  are wrong!

Its.       BCÀ

Thanks for that great explanation guest :)

5 x 3 x 6=90cm^3

isn't it infinity!?!?:)

What?

how is you day?!?!:)

i got abcde

I see where you get at but i have  ABCDE Answear sheet and your answear isn't on there the closest i can get is BAC

These are the answear(s) BAC, ABC, CAB, CBA, ACB.   BCA isn't in and of the possible answears!