A ball falls from the top of a building, through the air (air resistance is present), to the ground below. How does the kinetic energy (KE) just before striking the ground compare to the potential energy (PE) at the top of the building?

a. K is equal to U.
b. K is greater than U.
c. K is less than U.
d. It is impossible to tell

Divide 108.2 x 10^6 into 1.5 x 10 and the result will be in au (astronomical units)

10 is the . . .

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. 

We can infer that star y is closer but other factors must be considered include the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contains less heat.