Free points cause why not

hi :)

Ineed on this question me get the answer

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

When a whole number is multiplied by 104, how does the placement of the decimal point change? a. it moves ten places to the right. b. it moves four places to the left. c. it moves ten places to the left. d. it moves four places to the right.