So s(t) dt = 10 s(t) dt = 8 (3 r(t ) dt = - 1 So r(t) dt = 11 Use these values and properties of definite integrals to evaluate the indicated definite integral. A : So ( r (t ) + s (t ) ) dt B: S5 (s(t) - r(t)) dt c: /3 (IS (t) + 3r(t)) dt D: Find a formula for a in terms of b such that So (ar (t ) + bs (t) ) dt = 0