Substance a has an associated increased health risk of 12% and the increased risk associated with substance b is 18%. when studied together, the increased risk associated with being exposed to both substance a in conjunction with substance b is 60%. is the health risk associated with this combination of substances synergistic?

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.