jennarosebrand2790 jennarosebrand2790 26-05-2023 Mathematics contestada consider the functions below. f(x, y, z) = x i − z j y k r(t) = 6t i 9t j − t2 k (a) evaluate the line integral c f · dr, where c is given by r(t), −1 ≤ t ≤ 1.