LOS LADOS DE UN TRIANGULO TIENEN LONGITUDES EN LA RAZON 6:7:10,EL PERIMETRO DEL TRIANGULO ES DE 184 CM. ENCUENTRA LA LONGITUD DE LOS LADOS

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

Can someone show me step by step how to do this?