Daniela has money automatically deposited into a saving account each week. After 3 weeks, she has $18.After 5 weeks, she had $30.The unit rate is measured in dollars per week. What it the constant of proportionality?

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.