Answer:
[tex]\large \boxed{\text{1.3 kg}}}[/tex]
Step-by-step explanation:
1 kg = 2.205 lb
[tex]\text{Mass} = \text{2.8 lb} \times \dfrac{\text{1 kg}}{\text{2.205 lb}} = \text{1.3 kg}\\\\\text{The mass of the ground beef is $\large \boxed{\textbf{1.3 kg}}$}[/tex]
