You drive an old truck along a straight road at 20.0 km/hr for 15 km until it runs out of gas. For the next 30.0 minutes, you walk 2.0 km further up the road to a gas station at constant velocity. Suppose it takes 1 hour to pump the gas, pay for it, and walk back to the truck. What is the average velocity vav from the start of the drive to returning to the truck? Give your answer in units of km/hr.

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience.b. report the adverse drug experience to the irb only if there are several other occurrences.c. report the adverse drug experience as part of the continuing review report.d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.