Greg is in a bike race. At mile marker four (out of ten), his speed was measured at 13. 5 mph. Which best describes the measured number? It is the average speed of the bike rider. It is the instantaneous speed of the bike rider. It is the instantaneous velocity of the bike rider. It is the average velocity of the bike rider.

In an ecosystem, marsh snails feed on phytoplankton and painted turtles feed on marsh snails. pollution has resulted in the depletion of phytoplankton. what effect would this situation likely have on the population of marsh snails and painted turtles? as phytoplankton were destroyed, the population of marsh snails would most likely then the population of painted turtles would mostly likely a. 1. increase 2. decrease 3. stay the same b. 1. increase 2. decrease 3. stay the same