The half-life of cadmium-109 is 464 days . A scientist measures out a 256 .0 gram (g) sample .
Approximately how many grams of cadmium-109 would remain after 1,392 days?

A=32.0g

Explanation:

classic problem. use the half life formula and figure out which variables are missing.

answer: the answer is a

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.