Step-by-step explanation:
To determine the direction of the force particle q2 is exerting on particle q₁, we can use Coulomb's Law, which states that like charges repel each other and opposite charges attract each other.
Given that q₁ is +13.0 μC and q₂ is +7.70 μC, both particles have the same positive charge. Therefore, they will exert a repulsive force on each other.
Since the charges are positive and repel each other, the force exerted by particle q₂ on particle q₁ will be directed away from q₂. In other words, the force will be pushing particle q₁ to the right (+).
Hence, the direction of the force exerted by particle q₂ on particle q₁ is to the right (+).