Math Help?

Question

Solve:

N= 3(pi) √(1/P) for P

(pi)=3.14

Answer 1

N= 3(pi) √(1/P) (P>0)
[N/(3pi)] = √(1/P)
1/P=[N/(3pi)]^2
P=1/{[N/(3pi)]^2}

Answer 2

Square terms to take 1/P out of the square root:
N^2 = 9 pi^2 * 1/P.
Divide so as to isolate 1/P:
1/P = N^2/9 pi^2,
P = 1/(N^2/9 pi^2),
P = 9 pi^2/N^2,
P = 88.7/N^2 [ans].

Answer 3

Wtite
N^2 = 9(pi)^2 / P

then

P = etc