‘restrict access to [a certain thing]’
Merriam-Webster has an entry for ‘icosahedron’, but not for ‘icosagon’.
keywords: dictionary, dictionaries, errors and omissions
The values for Empirical Rule are 68%, 95%, and 99.7%. We are concerned with the digits of the first and third entries, that is, with 68 and 997. These two values correspond to the number of primes, modulo 100, not exceeding 1000, and to the largest prime not exceeding 1000, respectively.
Also, the number of hours in a week, mod 100, is also 68.
keywords: Mathematics, Number Theory