13. The equation y= y,e is a model for the decay of a radioactive material. The initial amount of the material is 30g and after 6 hours, 10g remain. Use this information to find the value of k. 14. Using the equation from number 13 above (with the k value you found) determine the amount of material remaining after 8 hours.
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
How do you proceed to answer homework questions 13 and 14?


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