The half-life of a Radioactive sample is 80 hrs. Initially, there are 6,000,0000 nuclei in the sample. How many nuclei will remain after 10 days?

The answer should be a.

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

There was no intial y-momentum so the net final y-momentum must also be 0. they can have final velocities in the y-direction

Feathee pleaaww i hops i