Find the missing values

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Find square roots of 7056

stepbystep answer plz

The area of a square field is 617796cm^2. Find the length of its each side.

Plz Answer StepByStep and correct.

1) How to solve the IBVP Utt=c²Uxx subject to the following conditions Ux(0,t)=0= Ux(1,t) U(x,0)= cos2πx , Ut(x,0)= -2πcosπx where x E [0,1]

2) Utt=c²Uxx Ux(0,t) = 0 = Ux(1,t) , t>1 U(x,0)=0, Ut(x,0)=-1 when 1/4<x<3/4 =0 otherwise Plz help