(4 times 10-7) mm.
9.4 kilometers = 9,400,000 millimeters: 9,400,000 mm in Scientific Notation = 9.4 x 106 mm
4.5834 x 10-3.
5 of course
4.75 cm equals 47.5 mm. There are 10 mm in 1 cm. So you multiply 4.75 * 10.