CPhill

The first time, you would be half-dead....

After the second time, you'd still be (1/4)  alive since (1/2)  of (1/2)     = (1/4)

We can't definitely say.......by the time we submitted any answer, you would have aged a slight bit

2pi (36 in)  (90/360)  =

2pi (36 in)(1/4)  =

2pi * 9  =

18 pi   inches

3√3 x √3   remember that this is really just

3  x √3 x √3  =

3 x √9

3 x 3   = 

9

50 : 3 =  30 : ?

50/3  = 30/ ?       cross-multiply

50 * ?   = 30 * 3

50 * ?   =  90        divide both sides by 50

?  =  90 / 50    =   9/5

6√3 by 2  =

(6/2) * √3  =

3 * √3

sin∅=1/2 then cos∅  =

sin  = y / r

cos = x / r

x = sqrt ( 2^2  - 1^2)  = sqrt (4 - 1)   = sqrt(30

So......cos ∅  =   sqrt (3)  / 2

If rotated clockwise, the new image is (1, 6)

If rotated counter-clockwise, the new image is (-1, - 6)

Neither one

Call the original radius, r

Then the original area  = pi* r^2    and the original circumference  = 2pi* r

If he doubles the radius, the new area becomes pi *(2r)^2  = 4pi*r^2  = 4 times as much

But......the new circumference will just be  2pi * (2r)  = 4pi*r   = only 2 times as much