Problem 1: A rod with a length of 3 meters has a density given by δ(x) = 3 + 8x (g/m) at a distance x meters from its left end. Complete the Riemann sum approximation. Which of the following options is correct?
A) δ(x) = 3 + 8x (g/m)
B) δ(x) = 3 + 8x
C) δ(x) = 3 + 8x (m/g)
D) δ(x) = 3 + 8x (m/g)