What is equivalent to 1/11?

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?