Cesium-137 has a half life of approximately 30 years. How much of a 40 g sample would be left after 90 years?

A. 14.33 g

B. 6.31 g

C. 32.49 g

D. 5 g

E. 26.67 g

5

Step-by-step explanation:

30 years => 20

60 years => 10

90 years => 5

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.