Respuesta :

AndyBryer
Divide by c^2, m=E/(c^2)
M=725/(-5)^2
M=725/25
M=29
luana
[tex]E=mc^2\ \ \ \ |:c^2\\\\m=\frac{E}{c^2}\\\\m=\frac{725}{(-5)^2}\\\\m=\frac{725}{25}\\\\\boxed{m=29}[/tex]