Question

Which is the more reasonable measurement of the distance between the tracks on a DVD:
7.4 ⋅ 10^−4 mm or 7.4 ⋅ 10^4 mm? Justify your answer

Answer 1

well 10^4 = 10000 mm x 7.4
10^-4 = 0.0001 mm x 7.4

so what you want is the smaller measure

Answer 2

so i want 10^-4 because i want the smallest number...

Answer 3

correct

Answer 4

thank u have a great day :)