9th grade test i need help quick

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

If jaime wants to find 60% of 320, which table should he use?

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl