Find the sum 42+0.42+4.5+0.2
A.0.128
B.1.28
C.46.64
D.46.82
E.84.44

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.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?