My understanding is that as the measurement of the circumference of a circle is derived from an equation using "pi" with pi being an indefinite number, the measurement of the circumference of a circle is also an indefinite number, but the figure can be rounded back to a predetermined number of decimal places.
18
how did thrity get its origin name
30= thirty
20
1,2,3,4,6,9,12,18,36
16
12
An abbreviation for three hundred thousand dollars is 300K.
50%
Four
0.36
38".
Thirty percent of 15 is 4.5