
Suppose the Mars rover is traveling along a path. At different spots along the path, it collects data about how fast dust is accumulating on it. The table below gives this information: $p$ is the distance the rover has traveled and $R(p)$ is the rate that the dust is accumulating in mg per km.
$\sum R(p) \Delta p$ $\sum R(p) * 20$ $\sum _{k=0}^{4} R(p_k)*p_k$ $\sum _{k=0}^{4} R(p_k)*20$ $\sum _{k=1}^{5} R(p_k)*p_k$ $\sum _{k=1}^{5} R(p_k)*20$ $\sum _{k = 1}^{5} R(p)*p$ $\sum _{k=0}^{100} R(p_k)*20$ $\sum _{k=1}^{5} R(p_{k+1})*20$ We would need more information to determine this answer