the circle p has a center at (0,0) and a point on the circle at (0,4) if it is dilated by a factor of 4 what is the distance of
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Remember the divisibility rule for 9. The sum of the digits of the number must be divisible by nine.
Let the digit be
. Then 
has to be divisible by nine. Recalling that 
, we note that 
.
Let the digit be