Verified Answer :

crisforp

a = 256 ;
ar = 192 ;
r = 192 / 256 = 0.75 ;
ar^2 = 144;
r^2 = 144 / 256 = 0.5625 ;
r = \(\sqrt{0.5625} =0.75\) ;
where r ≠ 0 is the common ratio and a is a  scale factor ;

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