Which of the following equations has amplitude = 2 period = pi/4 and phase shift plus/minus pi/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.

What fraction is equivalent to 0.46464646··· a. 46⁄99 b. 46⁄999 c. 46⁄100 d. 23⁄50

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points