Which is the best estimate for (6.3x 10^-2)(9.9x 10^-3)written in scientific notation?

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

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.

Solve for x and y a x= 13.3 y= 16.7 b x= 23.3 y= 12.5 c x= 7.5 y= 16.7 d x=7.5 y= 12.5