The Linear Density of a Rod, in G/m, Is Given $\lambda=40.0+30.0 x$

Multiple Choice

The linear density of a rod, in g/m, is given by $\lambda=40.0+30.0 x$ . The rod extends from the origin to x = 0.400 m. What is the mass of the rod?

A) 0.213 g
B) 3.50 g
C) 3.84 g
D) 18.4 g
E) 20.8 g