Question

Objects on the "Human Scale" start at small dust particles about 10-5 meters across and go up to small asteroids of about 105 meters across. How many powers of ten does the "Human Scale" span?

Select one:
a. 0
b. 5
c. 10
d. 9
e. 15

Answer 1

5 - (-5) = 5 + 5 = 10.