The formula is pi*r^2*h/3
your answer would have to be B
I think it maybe be <span>complementary</span>, sorry I'm not completely sure but i hope this helps.
The correct answer is 784 m^2
49x^2 - 9 = 0
As there is no x term, we can pretty much guess we have a situation where we factlrise by something known aa difference of two squares, so to factorise it:
49 = 7^2
9 = 3^2
x^2 = (x)^2
so...
(7x - 3)(7x + 3) = 0
7x - 3 = 0 7x + 3 = 0
x = 3/7 x = -3/7
