Ishmail jogs around a track that is in the shape of a regular pentagon. One side of the pentagon is 1/4 mile long. How far does Ishmail jog if he completes 6 laps around the track?

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks