After three half-lives, what fraction of a radioactive sample has decayed

5/6
1/2
7/8
2/3

It has to be 5/6 your adding 2 to both the numerator and denominator each time

Explanation:

the answer is b

explanation:

  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.