Which of the following is a quantity that could be represented by the number 2003-02-01-00-00_files/i0240000.jpg?
A.
the diameter (in meters) of an atom
B.
the time it takes (in minutes) to blink
C.
the occupancy limit of a pizza restaurant
D.
the annual salary of a high school math teacher

Question

Vocaloid · Answer

Missing number is 2 * 10^(-3)

Negative exponent tells us that this number is some decimal between 0 and 1, thus eliminating C and D which both must be numbers above 1.

Now, looking at the number, 2*10^(-3) is 0.002. is this more reasonable for the diameter of an atom or the time it takes to blink in minutes? if you are unsure, it would be wise to look up the average diameter of an atom, and how many minutes it takes to blink, to see which one is closer to 0.002.