The diameter of a red blood cell is 6 x 10^-6 how many red blood cells are needed to make a line 1 in. long The answer is 4233 however I need help understanding how we get that answer.

When you dilate a figure with a scale factor of 1/2, what will the dilated figure look like?                                                                                           a: the dilated figure will have side lengths that are half the length of the original side lengths.                                                                          b: the angles in the dilated figure will be half the measure of the original figure.                                                                                c: the dilated figure will have side lengths twice the length of the original.