Answer:
Option D - 25
Step-by-step explanation:
Given : A sample of rock is found to contain 100 grams of a parent isotope.
To find : How many grams of the parent isotope will remain after two half-lives.
Solution : A sample of rocks contain parent isotope = 100 gram
After one half life of the parent isotope i.e. divided by 2
After two half lives of the parent isotope means again divide one-half life by 2
Which means 25 gram of the parent isotope will remain after two half lives.
Therefore, Option D is correct -25
To shift vertically the graph of the function , you have to add a constant to its expression:
If k is positive, you shift the function k units above, if k in negative, you shift the function k units below.
So, if you want to shift the graph of two units down, you have to subtract 2 (i.e., add -2):