Match the stem and leaf plot to the correct set of data. 15, 15, 16, 21, 21, 21, 35, 36 1.5, 1.5, 1.6, 2.1, 2.1, 2.1, 3.5, 3.6, 3.7 6, 5, 5, 1, 1, 1, 1, 1, 1, 6, 6, 6, 5, 5, 5 1.5, 1.5, 1.6, 2.1, 2.1, 2.1, 3.5, 3.6

If a • b*2 = 1.8 x 10*-7, and c•b/d = 7.2 x 10*-4, find the value of a•d*2/c*2

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.

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?