The distance between data tracks on a CD is 1.6 x 10^-6 meters. what is the distance in standard form?

In some parts of the world, the number you supplied is already in standard form.

In the US, we might say it is in standard form when it is written as any of

0.0000016 m

0.00016 cm

0.0016 mm

1.6 μm

1600 nm