Answer:
The rock weighs 3 pounds more on Earth than on Mar
Explanation:
Given that the weight of an object in Mars is 2/5 its weight on earth.
[tex]M=\frac{2}{5}E[/tex]If a rock weighs 5 pounds on Earth;
[tex]E=5\text{ lb}[/tex]its weight on mars will be;
[tex]\begin{gathered} M=\frac{2}{5}(5\text{ lb)} \\ M=2\text{ lb} \end{gathered}[/tex]The difference between their ages is;
[tex]\begin{gathered} =E-M \\ =5lb-2lb \\ =3\text{ lb} \end{gathered}[/tex]Therefore, the rock weighs 3 pounds more on Earth than on Mars.
