Jack's mother gave him 50choclates to give his friends at his birthday party. he gave 3chocolates to each of his friends and still had 2chocolates left

48

Step-by-step explanation:

If he had 50 chocolates and give 3 to each friend them you find the closest number to 50 that 3 can go into. The biggest number that 3 can go into is 16. 3 times 16 is 48. And with 48 there is still 2 left over.

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents